Osteoarthritis

DENVER – Adding therapies such as acupuncture, electrophysical stimulation, or other interventions to standard exercise therapy does not appear to offer much benefit in pain relief or physical function for patients with knee osteoarthritis, according to a study presented at the OARSI 2023 World Congress. The findings were also published in the Cochrane Database of Systematic Reviews in October 2022.

“The results do not support the use of adjunctive therapies when we add them to exercise for pain, physical function, or quality of life, when compared against placebo, adjunctive therapy, and exercise,” Helen P. French, PhD, told attendees at the meeting sponsored by the Osteoarthritis Research Society International. The findings were similar for pain and physical function when comparing adjunctive therapies with exercise against exercise alone, said Dr. French, an associate professor in physiotherapy at the Royal College of Surgeons, Dublin, except that patients using adjunctive therapies reported feeling greater improvement in their global assessments.

Exercise is recommended as a core treatment for osteoarthritis, but some patients or clinicians may be interested in supplementing that therapy with acupuncture, heat therapy, electromagnetic fields, transcutaneous electrical nerve stimulation, braces/orthotics, and other interventions. Various Cochrane Reviews of the evidence exist for these interventions in treating chronic pain in general but not for their use as adjunctive therapies in addition to exercise for osteoarthritis pain.

Researchers therefore assessed the evidence for improvement in pain, physical function, and quality of life for two sets of comparisons: adjunctive therapies plus exercise versus exercise alone, and adjunctive therapies with exercise versus placebo adjunctive therapy with exercise. The review excluded studies looking at medications or supplements.

Pain was assessed with the Numeric Pain Rating Scale (NPRS, 0-10), with an improvement of at least 2 points (15% improvement) representing the minimum clinically important difference (MCID). Physical function was assessed with the Western Ontario and McMaster Universities Arthritis Index (WOMAC, 0-68), with 6 points (15%) considered the MCID, and quality of life was assessed with the SF-36 (0-100), with 6 points (12%) as the MCID.

The researchers identified trials on knee osteoarthritis that included an overall 6,508 participants with an average age ranging from 52 to 83 years. A total of 36 studies evaluated electrophysical agents. Another seven looked at manual therapies; four looked at acupuncture/dry needling or taping; three looked at psychological, dietary, or “whole body vibration” therapies; and two evaluated spa or peloid therapy. Only one trial evaluated foot insoles.

Nearly all the studies (98%) assessed pain, and most (87%) assessed physical function. Only about one in five (21%) assessed quality of life. The improvement in pain from adding adjunctive therapies to exercise, compared with placebo therapies plus exercise, was 0.77 points, or just under a 10% improvement, which fell short of the 15% MCID. Physical function improvement similarly fell short, with an average improvement of 5 points (12%).

In comparisons of exercise plus adjunctive therapies against exercise alone, the improvement from the additional interventions was even lower. Pain improvement was 0.41 points (7%), and physical function improvement was 2.8 points (9%). However, patients’ perceptions told a different story: 37% more patients who were using an adjunctive therapy reported feeling that the therapies were successful, compared with patients undergoing exercise therapy alone.

Adverse events were poorly reported in the trials, with only 10 trials reporting them at all, and the researchers found no significant difference in adverse events among the studies reporting them. The most common adverse events were increased pain in the joint with the osteoarthritis, pain elsewhere, or swelling and inflammation. It’s unclear, however, whether the pain, swelling, and inflammation were related to the interventions and how serious these effects might have been.

Michelle Hall, PhD, an associate professor in the department of physiotherapy at the University of Melbourne, comoderated the session with this presentation and found it interesting that more than one-third of patients perceived that they did better with the additional therapies even though improvement didn’t bear out in their pain or physical function assessments.

“But the other part of that was that the studies were of poor quality, so we can’t say with confidence, ‘Don’t do this therapy because it’s not going to work,’ ” Dr. Hall said in an interview. She said she personally would probably discourage patients from those therapies, “but I don’t think the evidence is there for everybody to do that,” she added.

Martin Van Der Esch, PhD, of Reade Centre of Rehabilitation and Rheumatology in Amsterdam, also comoderated the discussion and had more concerns about the use of adjunctive therapies in light of the study’s findings. He said in an interview that he tended to believe the patients’ overall self-reported improvement is likely a placebo effect, and he sees potential harm in that effect. If the pain is not truly decreasing as patients continue using those therapies, then the pain may become a more stable part of the nervous system, “so I think they need to do an intervention which really has evidence in reducing pain, an active approach that means exercising in the right way,” Dr. Van Der Esch said. If patients are undergoing therapy whose primary benefit is a placebo effect, “the pain will prolong and become more fixed in the nervous system,” shifting the patients toward greater risk of the pain becoming chronic, he said.

“I want to emphasize that we have an ethical role to our management, and it’s not ethical to give treatments which have no response and no pain relief except that the patient or the professional believes it will have an effect,” Dr. Van Der Esch said.

The research did not involve outside funding. Dr. French, Dr. Hall, and Dr. Van Der Esch reported having no relevant financial relationships.

DENVER – Adding therapies such as acupuncture, electrophysical stimulation, or other interventions to standard exercise therapy does not appear to offer much benefit in pain relief or physical function for patients with knee osteoarthritis, according to a study presented at the OARSI 2023 World Congress. The findings were also published in the Cochrane Database of Systematic Reviews in October 2022.

“The results do not support the use of adjunctive therapies when we add them to exercise for pain, physical function, or quality of life, when compared against placebo, adjunctive therapy, and exercise,” Helen P. French, PhD, told attendees at the meeting sponsored by the Osteoarthritis Research Society International. The findings were similar for pain and physical function when comparing adjunctive therapies with exercise against exercise alone, said Dr. French, an associate professor in physiotherapy at the Royal College of Surgeons, Dublin, except that patients using adjunctive therapies reported feeling greater improvement in their global assessments.

Exercise is recommended as a core treatment for osteoarthritis, but some patients or clinicians may be interested in supplementing that therapy with acupuncture, heat therapy, electromagnetic fields, transcutaneous electrical nerve stimulation, braces/orthotics, and other interventions. Various Cochrane Reviews of the evidence exist for these interventions in treating chronic pain in general but not for their use as adjunctive therapies in addition to exercise for osteoarthritis pain.

Researchers therefore assessed the evidence for improvement in pain, physical function, and quality of life for two sets of comparisons: adjunctive therapies plus exercise versus exercise alone, and adjunctive therapies with exercise versus placebo adjunctive therapy with exercise. The review excluded studies looking at medications or supplements.

Pain was assessed with the Numeric Pain Rating Scale (NPRS, 0-10), with an improvement of at least 2 points (15% improvement) representing the minimum clinically important difference (MCID). Physical function was assessed with the Western Ontario and McMaster Universities Arthritis Index (WOMAC, 0-68), with 6 points (15%) considered the MCID, and quality of life was assessed with the SF-36 (0-100), with 6 points (12%) as the MCID.

The researchers identified trials on knee osteoarthritis that included an overall 6,508 participants with an average age ranging from 52 to 83 years. A total of 36 studies evaluated electrophysical agents. Another seven looked at manual therapies; four looked at acupuncture/dry needling or taping; three looked at psychological, dietary, or “whole body vibration” therapies; and two evaluated spa or peloid therapy. Only one trial evaluated foot insoles.

Nearly all the studies (98%) assessed pain, and most (87%) assessed physical function. Only about one in five (21%) assessed quality of life. The improvement in pain from adding adjunctive therapies to exercise, compared with placebo therapies plus exercise, was 0.77 points, or just under a 10% improvement, which fell short of the 15% MCID. Physical function improvement similarly fell short, with an average improvement of 5 points (12%).

In comparisons of exercise plus adjunctive therapies against exercise alone, the improvement from the additional interventions was even lower. Pain improvement was 0.41 points (7%), and physical function improvement was 2.8 points (9%). However, patients’ perceptions told a different story: 37% more patients who were using an adjunctive therapy reported feeling that the therapies were successful, compared with patients undergoing exercise therapy alone.

Adverse events were poorly reported in the trials, with only 10 trials reporting them at all, and the researchers found no significant difference in adverse events among the studies reporting them. The most common adverse events were increased pain in the joint with the osteoarthritis, pain elsewhere, or swelling and inflammation. It’s unclear, however, whether the pain, swelling, and inflammation were related to the interventions and how serious these effects might have been.

Michelle Hall, PhD, an associate professor in the department of physiotherapy at the University of Melbourne, comoderated the session with this presentation and found it interesting that more than one-third of patients perceived that they did better with the additional therapies even though improvement didn’t bear out in their pain or physical function assessments.

“But the other part of that was that the studies were of poor quality, so we can’t say with confidence, ‘Don’t do this therapy because it’s not going to work,’ ” Dr. Hall said in an interview. She said she personally would probably discourage patients from those therapies, “but I don’t think the evidence is there for everybody to do that,” she added.

Martin Van Der Esch, PhD, of Reade Centre of Rehabilitation and Rheumatology in Amsterdam, also comoderated the discussion and had more concerns about the use of adjunctive therapies in light of the study’s findings. He said in an interview that he tended to believe the patients’ overall self-reported improvement is likely a placebo effect, and he sees potential harm in that effect. If the pain is not truly decreasing as patients continue using those therapies, then the pain may become a more stable part of the nervous system, “so I think they need to do an intervention which really has evidence in reducing pain, an active approach that means exercising in the right way,” Dr. Van Der Esch said. If patients are undergoing therapy whose primary benefit is a placebo effect, “the pain will prolong and become more fixed in the nervous system,” shifting the patients toward greater risk of the pain becoming chronic, he said.

“I want to emphasize that we have an ethical role to our management, and it’s not ethical to give treatments which have no response and no pain relief except that the patient or the professional believes it will have an effect,” Dr. Van Der Esch said.

The research did not involve outside funding. Dr. French, Dr. Hall, and Dr. Van Der Esch reported having no relevant financial relationships.

DENVER – Adding therapies such as acupuncture, electrophysical stimulation, or other interventions to standard exercise therapy does not appear to offer much benefit in pain relief or physical function for patients with knee osteoarthritis, according to a study presented at the OARSI 2023 World Congress. The findings were also published in the Cochrane Database of Systematic Reviews in October 2022.

“The results do not support the use of adjunctive therapies when we add them to exercise for pain, physical function, or quality of life, when compared against placebo, adjunctive therapy, and exercise,” Helen P. French, PhD, told attendees at the meeting sponsored by the Osteoarthritis Research Society International. The findings were similar for pain and physical function when comparing adjunctive therapies with exercise against exercise alone, said Dr. French, an associate professor in physiotherapy at the Royal College of Surgeons, Dublin, except that patients using adjunctive therapies reported feeling greater improvement in their global assessments.

Exercise is recommended as a core treatment for osteoarthritis, but some patients or clinicians may be interested in supplementing that therapy with acupuncture, heat therapy, electromagnetic fields, transcutaneous electrical nerve stimulation, braces/orthotics, and other interventions. Various Cochrane Reviews of the evidence exist for these interventions in treating chronic pain in general but not for their use as adjunctive therapies in addition to exercise for osteoarthritis pain.

Researchers therefore assessed the evidence for improvement in pain, physical function, and quality of life for two sets of comparisons: adjunctive therapies plus exercise versus exercise alone, and adjunctive therapies with exercise versus placebo adjunctive therapy with exercise. The review excluded studies looking at medications or supplements.

Pain was assessed with the Numeric Pain Rating Scale (NPRS, 0-10), with an improvement of at least 2 points (15% improvement) representing the minimum clinically important difference (MCID). Physical function was assessed with the Western Ontario and McMaster Universities Arthritis Index (WOMAC, 0-68), with 6 points (15%) considered the MCID, and quality of life was assessed with the SF-36 (0-100), with 6 points (12%) as the MCID.

The researchers identified trials on knee osteoarthritis that included an overall 6,508 participants with an average age ranging from 52 to 83 years. A total of 36 studies evaluated electrophysical agents. Another seven looked at manual therapies; four looked at acupuncture/dry needling or taping; three looked at psychological, dietary, or “whole body vibration” therapies; and two evaluated spa or peloid therapy. Only one trial evaluated foot insoles.

Nearly all the studies (98%) assessed pain, and most (87%) assessed physical function. Only about one in five (21%) assessed quality of life. The improvement in pain from adding adjunctive therapies to exercise, compared with placebo therapies plus exercise, was 0.77 points, or just under a 10% improvement, which fell short of the 15% MCID. Physical function improvement similarly fell short, with an average improvement of 5 points (12%).

In comparisons of exercise plus adjunctive therapies against exercise alone, the improvement from the additional interventions was even lower. Pain improvement was 0.41 points (7%), and physical function improvement was 2.8 points (9%). However, patients’ perceptions told a different story: 37% more patients who were using an adjunctive therapy reported feeling that the therapies were successful, compared with patients undergoing exercise therapy alone.

Adverse events were poorly reported in the trials, with only 10 trials reporting them at all, and the researchers found no significant difference in adverse events among the studies reporting them. The most common adverse events were increased pain in the joint with the osteoarthritis, pain elsewhere, or swelling and inflammation. It’s unclear, however, whether the pain, swelling, and inflammation were related to the interventions and how serious these effects might have been.

Michelle Hall, PhD, an associate professor in the department of physiotherapy at the University of Melbourne, comoderated the session with this presentation and found it interesting that more than one-third of patients perceived that they did better with the additional therapies even though improvement didn’t bear out in their pain or physical function assessments.

“But the other part of that was that the studies were of poor quality, so we can’t say with confidence, ‘Don’t do this therapy because it’s not going to work,’ ” Dr. Hall said in an interview. She said she personally would probably discourage patients from those therapies, “but I don’t think the evidence is there for everybody to do that,” she added.

Martin Van Der Esch, PhD, of Reade Centre of Rehabilitation and Rheumatology in Amsterdam, also comoderated the discussion and had more concerns about the use of adjunctive therapies in light of the study’s findings. He said in an interview that he tended to believe the patients’ overall self-reported improvement is likely a placebo effect, and he sees potential harm in that effect. If the pain is not truly decreasing as patients continue using those therapies, then the pain may become a more stable part of the nervous system, “so I think they need to do an intervention which really has evidence in reducing pain, an active approach that means exercising in the right way,” Dr. Van Der Esch said. If patients are undergoing therapy whose primary benefit is a placebo effect, “the pain will prolong and become more fixed in the nervous system,” shifting the patients toward greater risk of the pain becoming chronic, he said.

“I want to emphasize that we have an ethical role to our management, and it’s not ethical to give treatments which have no response and no pain relief except that the patient or the professional believes it will have an effect,” Dr. Van Der Esch said.

The research did not involve outside funding. Dr. French, Dr. Hall, and Dr. Van Der Esch reported having no relevant financial relationships.

DENVER – Using antidepressants to treat osteoarthritis pain can benefit some individuals but appears to have a clinically unimportant reduction in pain when looking at all patients who have tried them, according to a study presented at the OARSI 2023 World Congress. The review was also published in the Cochrane Database of Systematic Reviews in October 2022.

In terms of implications for clinical practice, the findings “seem to suggest there is a subgroup that is more likely to respond to antidepressants,” Anita Wluka, PhD, MBBS, a professor in the School of Public Health and Preventive Medicine at Monash University in Melbourne, told attendees. The findings also raise an important research question: “How can we identify the patient phenotype likely to benefit so we can [minimize the] risk of those adverse events and effects?”

Osteoarthritis pain is heterogeneous, and an estimated 30% of the pain is neuropathic-like, likely including central and peripheral sensitization, Dr. Wluka said. Given that antidepressants affect multiple sites along these pathways, multiple organizations have issued a conditional recommendation for duloxetine in their osteoarthritis guidelines, including OARSI, the European Alliance of Associations for Rheumatology, and the American College of Rheumatology.

The Cochrane Collaboration therefore conducted a systematic review and meta-analysis of research on the benefits and harms of using antidepressants to treat symptomatic knee and hip osteoarthritis. The review included studies through January 2021 whose participants had knee and/or hip osteoarthritis and which compared antidepressant therapy with placebo or another intervention for at least 6 weeks. The authors looked at seven outcomes: overall pain on a 0-10 scale, clinical response (at least a 50% reduction in 24‐hour mean pain), physical function using the Western Ontario and McMaster Universities Arthritis Index (WOMAC), quality of life using the EQ-5D, the proportion of participants withdrawing because of adverse events, the proportion who experienced any adverse events, and the proportion who experienced serious adverse events.

The researchers considered a change on the pain scale of 0.5-1 points to be “slight to small,” a difference above 1 up to 2 to be “moderate,” and a difference greater than 2 points to be “large.” In assessing quality of life function on a scale of 0-100, a slight to small difference was 5-10, a moderate difference was 11-20, and a large difference was above 20.

Of the 18 articles the researchers identified for qualitative synthesis, 9 met the criteria for qualitative synthesis in the meta-analysis, including 7 studies only on the knee and 2 that included the knees and hips. All nine studies compared antidepressants with placebo, with or without NSAIDs. Most focused on serotonin and norepinephrine reuptake inhibitors (SNRIs) – six studies on duloxetine and one on milnacipran – while one included fluvoxamine and one included nortriptyline.

The trials included a combined 2,122 participants who were predominantly female with an average age range of 54-66. Trials ranged from 8 to 16 weeks. Five of the trials carried risk of attrition and reporting bias, and only one trial had low risk of bias across all domains.

In five trials with SNRIs and one trial with tricyclics (nortriptyline) totaling 1,904 participants, 45% of those receiving antidepressants had a clinical response, compared with 29% of patients who received placebo (risk ratio, 1.55; 95% CI, 1.31-1.92). This absolute improvement in pain occurred in 16% more participants taking antidepressants, giving a number needed to treat (NNT) of 6. Average improvement in WOMAC physical function was 10.5 points with placebo and 16.2 points with antidepressants, indicating a “small, clinically unimportant response,” the researchers concluded.

Withdrawals because of adverse events included 11% of the antidepressant group and 5% of the placebo group (RR, 2.15; 95% CI, 1.56-2.87), putting the NNT for a harmful outcome at 17.

For all nine trials together, however, the mean reduction in pain from antidepressants was 2.3 points, compared with 1.7 points with placebo, a statistically significant but ”clinically unimportant improvement,” the researchers concluded. Adverse events occurred in 64% of the antidepressant group, compared with 49% of the placebo group (RR, 1.27; 95% CI, 1.15-1.41), which put the NNT for a harmful outcome at 7. No significant difference in serious adverse events occurred between the groups.

The analysis was limited by the low number of trials, most of which were sponsored by industry and most of which used duloxetine. Further, few of the studies enrolled patients with osteoarthritis of the hip, none assessed medium- or long-term effects, and none stratified the participants for different types of pain (neuropathic-like or central or peripheral pain sensitization).

“My general impression is that there was a statistically significant difference found in favor of duloxetine and the antidepressants,” David J. Hunter, MBBS, PhD, MSc, of the University of Sydney, said after the presentation. “There is a real risk of harm, which I think is important to take into consideration, but at least for me as a clinician and in advising other clinicians, it’s one tool in our armamentarium. I think it’s really important to allow patients to make an informed decision about the potential benefit, the real risk of harm, and the fact that it is quite useful in some patients, and I use it in my clinical practice.”

Jeffrey N. Katz, MD, MS, of Brigham and Women’s Hospital in Boston, said he uses antidepressants in the same way in his practice and that other types of medications, such as TNF inhibitors, also carry risk of harm that may exceed that of antidepressants.

“I’ve had lots of people start duloxetine, and if they stop it, it’s usually because they just don’t tolerate it very well,” Dr. Katz said.

“We don’t want to throw too many things away,” Dr. Hunter added. “Our patients don’t necessarily have a lot of choices here from a pharmacologic perspective, so I think it’s one of those options that I want to keep in my tool kit, and that’s not necessarily going to change.”

The research did not involve outside funding, and Dr. Wluka reported having no industry disclosures. Disclosure information was unavailable for Dr. Katz and Dr. Hunter. The Congress was sponsored by the Osteoarthritis Research Society International.

DENVER – Using antidepressants to treat osteoarthritis pain can benefit some individuals but appears to have a clinically unimportant reduction in pain when looking at all patients who have tried them, according to a study presented at the OARSI 2023 World Congress. The review was also published in the Cochrane Database of Systematic Reviews in October 2022.

In terms of implications for clinical practice, the findings “seem to suggest there is a subgroup that is more likely to respond to antidepressants,” Anita Wluka, PhD, MBBS, a professor in the School of Public Health and Preventive Medicine at Monash University in Melbourne, told attendees. The findings also raise an important research question: “How can we identify the patient phenotype likely to benefit so we can [minimize the] risk of those adverse events and effects?”

Osteoarthritis pain is heterogeneous, and an estimated 30% of the pain is neuropathic-like, likely including central and peripheral sensitization, Dr. Wluka said. Given that antidepressants affect multiple sites along these pathways, multiple organizations have issued a conditional recommendation for duloxetine in their osteoarthritis guidelines, including OARSI, the European Alliance of Associations for Rheumatology, and the American College of Rheumatology.

The Cochrane Collaboration therefore conducted a systematic review and meta-analysis of research on the benefits and harms of using antidepressants to treat symptomatic knee and hip osteoarthritis. The review included studies through January 2021 whose participants had knee and/or hip osteoarthritis and which compared antidepressant therapy with placebo or another intervention for at least 6 weeks. The authors looked at seven outcomes: overall pain on a 0-10 scale, clinical response (at least a 50% reduction in 24‐hour mean pain), physical function using the Western Ontario and McMaster Universities Arthritis Index (WOMAC), quality of life using the EQ-5D, the proportion of participants withdrawing because of adverse events, the proportion who experienced any adverse events, and the proportion who experienced serious adverse events.

The researchers considered a change on the pain scale of 0.5-1 points to be “slight to small,” a difference above 1 up to 2 to be “moderate,” and a difference greater than 2 points to be “large.” In assessing quality of life function on a scale of 0-100, a slight to small difference was 5-10, a moderate difference was 11-20, and a large difference was above 20.

Of the 18 articles the researchers identified for qualitative synthesis, 9 met the criteria for qualitative synthesis in the meta-analysis, including 7 studies only on the knee and 2 that included the knees and hips. All nine studies compared antidepressants with placebo, with or without NSAIDs. Most focused on serotonin and norepinephrine reuptake inhibitors (SNRIs) – six studies on duloxetine and one on milnacipran – while one included fluvoxamine and one included nortriptyline.

The trials included a combined 2,122 participants who were predominantly female with an average age range of 54-66. Trials ranged from 8 to 16 weeks. Five of the trials carried risk of attrition and reporting bias, and only one trial had low risk of bias across all domains.

In five trials with SNRIs and one trial with tricyclics (nortriptyline) totaling 1,904 participants, 45% of those receiving antidepressants had a clinical response, compared with 29% of patients who received placebo (risk ratio, 1.55; 95% CI, 1.31-1.92). This absolute improvement in pain occurred in 16% more participants taking antidepressants, giving a number needed to treat (NNT) of 6. Average improvement in WOMAC physical function was 10.5 points with placebo and 16.2 points with antidepressants, indicating a “small, clinically unimportant response,” the researchers concluded.

Withdrawals because of adverse events included 11% of the antidepressant group and 5% of the placebo group (RR, 2.15; 95% CI, 1.56-2.87), putting the NNT for a harmful outcome at 17.

For all nine trials together, however, the mean reduction in pain from antidepressants was 2.3 points, compared with 1.7 points with placebo, a statistically significant but ”clinically unimportant improvement,” the researchers concluded. Adverse events occurred in 64% of the antidepressant group, compared with 49% of the placebo group (RR, 1.27; 95% CI, 1.15-1.41), which put the NNT for a harmful outcome at 7. No significant difference in serious adverse events occurred between the groups.

The analysis was limited by the low number of trials, most of which were sponsored by industry and most of which used duloxetine. Further, few of the studies enrolled patients with osteoarthritis of the hip, none assessed medium- or long-term effects, and none stratified the participants for different types of pain (neuropathic-like or central or peripheral pain sensitization).

“My general impression is that there was a statistically significant difference found in favor of duloxetine and the antidepressants,” David J. Hunter, MBBS, PhD, MSc, of the University of Sydney, said after the presentation. “There is a real risk of harm, which I think is important to take into consideration, but at least for me as a clinician and in advising other clinicians, it’s one tool in our armamentarium. I think it’s really important to allow patients to make an informed decision about the potential benefit, the real risk of harm, and the fact that it is quite useful in some patients, and I use it in my clinical practice.”

Jeffrey N. Katz, MD, MS, of Brigham and Women’s Hospital in Boston, said he uses antidepressants in the same way in his practice and that other types of medications, such as TNF inhibitors, also carry risk of harm that may exceed that of antidepressants.

“I’ve had lots of people start duloxetine, and if they stop it, it’s usually because they just don’t tolerate it very well,” Dr. Katz said.

“We don’t want to throw too many things away,” Dr. Hunter added. “Our patients don’t necessarily have a lot of choices here from a pharmacologic perspective, so I think it’s one of those options that I want to keep in my tool kit, and that’s not necessarily going to change.”

The research did not involve outside funding, and Dr. Wluka reported having no industry disclosures. Disclosure information was unavailable for Dr. Katz and Dr. Hunter. The Congress was sponsored by the Osteoarthritis Research Society International.

DENVER – Using antidepressants to treat osteoarthritis pain can benefit some individuals but appears to have a clinically unimportant reduction in pain when looking at all patients who have tried them, according to a study presented at the OARSI 2023 World Congress. The review was also published in the Cochrane Database of Systematic Reviews in October 2022.

In terms of implications for clinical practice, the findings “seem to suggest there is a subgroup that is more likely to respond to antidepressants,” Anita Wluka, PhD, MBBS, a professor in the School of Public Health and Preventive Medicine at Monash University in Melbourne, told attendees. The findings also raise an important research question: “How can we identify the patient phenotype likely to benefit so we can [minimize the] risk of those adverse events and effects?”

Osteoarthritis pain is heterogeneous, and an estimated 30% of the pain is neuropathic-like, likely including central and peripheral sensitization, Dr. Wluka said. Given that antidepressants affect multiple sites along these pathways, multiple organizations have issued a conditional recommendation for duloxetine in their osteoarthritis guidelines, including OARSI, the European Alliance of Associations for Rheumatology, and the American College of Rheumatology.

The Cochrane Collaboration therefore conducted a systematic review and meta-analysis of research on the benefits and harms of using antidepressants to treat symptomatic knee and hip osteoarthritis. The review included studies through January 2021 whose participants had knee and/or hip osteoarthritis and which compared antidepressant therapy with placebo or another intervention for at least 6 weeks. The authors looked at seven outcomes: overall pain on a 0-10 scale, clinical response (at least a 50% reduction in 24‐hour mean pain), physical function using the Western Ontario and McMaster Universities Arthritis Index (WOMAC), quality of life using the EQ-5D, the proportion of participants withdrawing because of adverse events, the proportion who experienced any adverse events, and the proportion who experienced serious adverse events.

The researchers considered a change on the pain scale of 0.5-1 points to be “slight to small,” a difference above 1 up to 2 to be “moderate,” and a difference greater than 2 points to be “large.” In assessing quality of life function on a scale of 0-100, a slight to small difference was 5-10, a moderate difference was 11-20, and a large difference was above 20.

Of the 18 articles the researchers identified for qualitative synthesis, 9 met the criteria for qualitative synthesis in the meta-analysis, including 7 studies only on the knee and 2 that included the knees and hips. All nine studies compared antidepressants with placebo, with or without NSAIDs. Most focused on serotonin and norepinephrine reuptake inhibitors (SNRIs) – six studies on duloxetine and one on milnacipran – while one included fluvoxamine and one included nortriptyline.

The trials included a combined 2,122 participants who were predominantly female with an average age range of 54-66. Trials ranged from 8 to 16 weeks. Five of the trials carried risk of attrition and reporting bias, and only one trial had low risk of bias across all domains.

In five trials with SNRIs and one trial with tricyclics (nortriptyline) totaling 1,904 participants, 45% of those receiving antidepressants had a clinical response, compared with 29% of patients who received placebo (risk ratio, 1.55; 95% CI, 1.31-1.92). This absolute improvement in pain occurred in 16% more participants taking antidepressants, giving a number needed to treat (NNT) of 6. Average improvement in WOMAC physical function was 10.5 points with placebo and 16.2 points with antidepressants, indicating a “small, clinically unimportant response,” the researchers concluded.

Withdrawals because of adverse events included 11% of the antidepressant group and 5% of the placebo group (RR, 2.15; 95% CI, 1.56-2.87), putting the NNT for a harmful outcome at 17.

For all nine trials together, however, the mean reduction in pain from antidepressants was 2.3 points, compared with 1.7 points with placebo, a statistically significant but ”clinically unimportant improvement,” the researchers concluded. Adverse events occurred in 64% of the antidepressant group, compared with 49% of the placebo group (RR, 1.27; 95% CI, 1.15-1.41), which put the NNT for a harmful outcome at 7. No significant difference in serious adverse events occurred between the groups.

The analysis was limited by the low number of trials, most of which were sponsored by industry and most of which used duloxetine. Further, few of the studies enrolled patients with osteoarthritis of the hip, none assessed medium- or long-term effects, and none stratified the participants for different types of pain (neuropathic-like or central or peripheral pain sensitization).

“My general impression is that there was a statistically significant difference found in favor of duloxetine and the antidepressants,” David J. Hunter, MBBS, PhD, MSc, of the University of Sydney, said after the presentation. “There is a real risk of harm, which I think is important to take into consideration, but at least for me as a clinician and in advising other clinicians, it’s one tool in our armamentarium. I think it’s really important to allow patients to make an informed decision about the potential benefit, the real risk of harm, and the fact that it is quite useful in some patients, and I use it in my clinical practice.”

Jeffrey N. Katz, MD, MS, of Brigham and Women’s Hospital in Boston, said he uses antidepressants in the same way in his practice and that other types of medications, such as TNF inhibitors, also carry risk of harm that may exceed that of antidepressants.

“I’ve had lots of people start duloxetine, and if they stop it, it’s usually because they just don’t tolerate it very well,” Dr. Katz said.

“We don’t want to throw too many things away,” Dr. Hunter added. “Our patients don’t necessarily have a lot of choices here from a pharmacologic perspective, so I think it’s one of those options that I want to keep in my tool kit, and that’s not necessarily going to change.”

The research did not involve outside funding, and Dr. Wluka reported having no industry disclosures. Disclosure information was unavailable for Dr. Katz and Dr. Hunter. The Congress was sponsored by the Osteoarthritis Research Society International.

DENVER – The relationship between nighttime knee pain from osteoarthritis and sleep disturbances is more complex than a simple association, according to new research presented at the Osteoarthritis Research Society International 2023 World Congress.

The findings suggested that the association between knee OA pain and sleep problems was also linked to activities of daily living, which can contribute to pain but are also affected by OA, Takahiro Sasahara, of the department of orthopedics at Juntendo University, Tokyo, and Koshigaya Municipal Hospital, Saitama, Japan, told attendees. The study also found that knee pain and mobility impairment were associated with sleep disturbances in older adults regardless of the severity of knee OA.

Luisa Cedin, a PhD student at Rush University, Chicago, who attended the presentation, noted the clinical implications of the interaction of daily activities with knee pain.

”I’m a physical therapist, and this could have a significant impact on the performance of the exercises that I’m requiring as a physical therapist,” Ms. Cedin said in an interview. “When you ask somebody who is not getting enough rest during the night – not only enough time but enough quality of rest – we know that we can expect a lower performance with any type of exercises, whether it’s less strength or force, less power, less agility, or less resistance or endurance, so this has a big impact on their quality of life.”

Mr. Sasahara cited research noting that acute pain occurs at the beginning of movement and during weight bearing and walking while chronic pain frequently occurs at night and in early morning awakenings. The prevalence of sleep disturbances in patients with chronic pain ranges from 50% to 80%, he said, and past evidence has shown the relationship between sleep and pain to be bidirectional.

For example, insomnia frequency and severity, sleep-onset problems, and sleep efficiency are all positively associated with pain sensitivity, and increasing severity of OA is linked to increasing prevalence of night knee pain and sleep problems, affecting quality of life, he said.

In this new study examining the relationship between sleep disturbance and knee pain and mobility, the researchers focused specifically on a population of older adults with knee OA. They analyzed data from the Bunkyo Health Study, which was conducted at Juntendo University’s Sportology Center to examine the association between metabolic, cardiovascular, cognitive dysfunction, and motor organ disorders in older adults from November 2015 to September 2018.

From the initial population of 1,630 adults, aged 65-84, who did not need medical treatment because of knee pain, the researchers analyzed data from 1,145 adults who the met this study’s criteria, which included MRI imaging of medial type knee OA. A little over half (55.7%) were women, with an average age of 73 and an average body mass index (BMI) of 22.8 kg/m².

In addition to blood and urine sampling, the researchers determined the severity of knee OA based on joint space width, femorotibial angle, and Kellgren and Lawrence (K/L) grade from x-rays in standing position. They also assessed the structure of knee OA using a whole-organ MRI score (WORMS), and pain and mobility with a visual analog scale, the Japan Knee Osteoarthritis Measure (JKOM), and the 25-question geriatric locomotive function scale.

The JKOM, based on the Western Ontario and McMaster Universities quality of life index for general knee OA, is adjusted to account for the Japanese lifestyle and covers four categories: knee pain and stiffness, a score for activities of daily living, a social activities score, and the patient’s health conditions.

Overall, 41.3% of the participants had sleep disturbances, based on a score of 6 or higher on the Pittsburgh Sleep Quality Index–Japanese. More women (55.7%) than men experienced sleep problems (P < .001), but there were no significant differences in the average age between those who did and those who did not have sleep issues. There were also no significance differences in BMI, joint space width, or femorotibial angle, which was an average 177.5 degrees in group with no sleep problems and 177.6 degrees in the group with sleep disturbances.

The proportion of participants experiencing sleep disturbances increased with increasing K/L grade of OA: 56.8% of those with K/L grade 4 had sleep problems, compared with 40.9% of those with K/L grade 3, 42.1% of those with K/L grade 2, and 33.7% of those with K/L grade 1, resulting in 30% greater odds of sleep disturbance with a higher K/L grade (odds ratio, 1.3; P = .011).

Knee pain at night was also significantly associated with severity of OA based on the K/L grade. While only 6.9% of participants reported pain at night overall, nearly 1 in 3 (29.5%) of those with K/L grade 4 reported pain at night, compared with 3.4% of those with K/L grade 1 (P < .001). (Night pain occurred in 5.4% of those with K/L grade 2 and 16.1% with K/L grade 3.)

However, after adjusting for age, gender, and BMI, the severity of knee OA was not significantly associated with sleep disturbance based on K/L grade, joint space width, femoro-tibial angle, and/or WORMS. But knee pain remained significantly associated with sleep disturbance after adjustment based on the visual analog scale and the JKOM (P < .001 for both).

Sleep problems were also significantly associated with each subcategory of the JKOM after adjustment (P < .001 for all but social activities, which was P = .014).

“Activities of daily living may affect the occurrence of knee pain at night,” Mr. Sasahara said, and “sleep disturbance may also disturb quality of life.” If sleep disturbances related to nighttime knee pain are linked to activities of daily living, then “not only knee pain but also activities of daily living need to be improved in order to improve sleep.”

He noted several of the study’s limitations, including the fact that lifestyle habits and work were not taken into account, nor did the researchers evaluate sleep disturbances potentially resulting from a medical illness. The researchers also only examined knee pain, not pain in other parts of the body.

The research was funded by Juntendo University; the Strategic Research Foundation at Private Universities; KAKENHI from the Ministry of Education, Culture, Sports, Science and Technology of Japan; the Mizuno Sports Promotion Foundation; and the Mitsui Life Social Welfare Foundation. Mr. Sasahara and Ms. Cedin had no disclosures.

DENVER – The relationship between nighttime knee pain from osteoarthritis and sleep disturbances is more complex than a simple association, according to new research presented at the Osteoarthritis Research Society International 2023 World Congress.

The findings suggested that the association between knee OA pain and sleep problems was also linked to activities of daily living, which can contribute to pain but are also affected by OA, Takahiro Sasahara, of the department of orthopedics at Juntendo University, Tokyo, and Koshigaya Municipal Hospital, Saitama, Japan, told attendees. The study also found that knee pain and mobility impairment were associated with sleep disturbances in older adults regardless of the severity of knee OA.

Luisa Cedin, a PhD student at Rush University, Chicago, who attended the presentation, noted the clinical implications of the interaction of daily activities with knee pain.

”I’m a physical therapist, and this could have a significant impact on the performance of the exercises that I’m requiring as a physical therapist,” Ms. Cedin said in an interview. “When you ask somebody who is not getting enough rest during the night – not only enough time but enough quality of rest – we know that we can expect a lower performance with any type of exercises, whether it’s less strength or force, less power, less agility, or less resistance or endurance, so this has a big impact on their quality of life.”

Mr. Sasahara cited research noting that acute pain occurs at the beginning of movement and during weight bearing and walking while chronic pain frequently occurs at night and in early morning awakenings. The prevalence of sleep disturbances in patients with chronic pain ranges from 50% to 80%, he said, and past evidence has shown the relationship between sleep and pain to be bidirectional.

For example, insomnia frequency and severity, sleep-onset problems, and sleep efficiency are all positively associated with pain sensitivity, and increasing severity of OA is linked to increasing prevalence of night knee pain and sleep problems, affecting quality of life, he said.

In this new study examining the relationship between sleep disturbance and knee pain and mobility, the researchers focused specifically on a population of older adults with knee OA. They analyzed data from the Bunkyo Health Study, which was conducted at Juntendo University’s Sportology Center to examine the association between metabolic, cardiovascular, cognitive dysfunction, and motor organ disorders in older adults from November 2015 to September 2018.

From the initial population of 1,630 adults, aged 65-84, who did not need medical treatment because of knee pain, the researchers analyzed data from 1,145 adults who the met this study’s criteria, which included MRI imaging of medial type knee OA. A little over half (55.7%) were women, with an average age of 73 and an average body mass index (BMI) of 22.8 kg/m².

In addition to blood and urine sampling, the researchers determined the severity of knee OA based on joint space width, femorotibial angle, and Kellgren and Lawrence (K/L) grade from x-rays in standing position. They also assessed the structure of knee OA using a whole-organ MRI score (WORMS), and pain and mobility with a visual analog scale, the Japan Knee Osteoarthritis Measure (JKOM), and the 25-question geriatric locomotive function scale.

The JKOM, based on the Western Ontario and McMaster Universities quality of life index for general knee OA, is adjusted to account for the Japanese lifestyle and covers four categories: knee pain and stiffness, a score for activities of daily living, a social activities score, and the patient’s health conditions.

Overall, 41.3% of the participants had sleep disturbances, based on a score of 6 or higher on the Pittsburgh Sleep Quality Index–Japanese. More women (55.7%) than men experienced sleep problems (P < .001), but there were no significant differences in the average age between those who did and those who did not have sleep issues. There were also no significance differences in BMI, joint space width, or femorotibial angle, which was an average 177.5 degrees in group with no sleep problems and 177.6 degrees in the group with sleep disturbances.

The proportion of participants experiencing sleep disturbances increased with increasing K/L grade of OA: 56.8% of those with K/L grade 4 had sleep problems, compared with 40.9% of those with K/L grade 3, 42.1% of those with K/L grade 2, and 33.7% of those with K/L grade 1, resulting in 30% greater odds of sleep disturbance with a higher K/L grade (odds ratio, 1.3; P = .011).

Knee pain at night was also significantly associated with severity of OA based on the K/L grade. While only 6.9% of participants reported pain at night overall, nearly 1 in 3 (29.5%) of those with K/L grade 4 reported pain at night, compared with 3.4% of those with K/L grade 1 (P < .001). (Night pain occurred in 5.4% of those with K/L grade 2 and 16.1% with K/L grade 3.)

However, after adjusting for age, gender, and BMI, the severity of knee OA was not significantly associated with sleep disturbance based on K/L grade, joint space width, femoro-tibial angle, and/or WORMS. But knee pain remained significantly associated with sleep disturbance after adjustment based on the visual analog scale and the JKOM (P < .001 for both).

Sleep problems were also significantly associated with each subcategory of the JKOM after adjustment (P < .001 for all but social activities, which was P = .014).

“Activities of daily living may affect the occurrence of knee pain at night,” Mr. Sasahara said, and “sleep disturbance may also disturb quality of life.” If sleep disturbances related to nighttime knee pain are linked to activities of daily living, then “not only knee pain but also activities of daily living need to be improved in order to improve sleep.”

He noted several of the study’s limitations, including the fact that lifestyle habits and work were not taken into account, nor did the researchers evaluate sleep disturbances potentially resulting from a medical illness. The researchers also only examined knee pain, not pain in other parts of the body.

The research was funded by Juntendo University; the Strategic Research Foundation at Private Universities; KAKENHI from the Ministry of Education, Culture, Sports, Science and Technology of Japan; the Mizuno Sports Promotion Foundation; and the Mitsui Life Social Welfare Foundation. Mr. Sasahara and Ms. Cedin had no disclosures.

DENVER – The relationship between nighttime knee pain from osteoarthritis and sleep disturbances is more complex than a simple association, according to new research presented at the Osteoarthritis Research Society International 2023 World Congress.

The findings suggested that the association between knee OA pain and sleep problems was also linked to activities of daily living, which can contribute to pain but are also affected by OA, Takahiro Sasahara, of the department of orthopedics at Juntendo University, Tokyo, and Koshigaya Municipal Hospital, Saitama, Japan, told attendees. The study also found that knee pain and mobility impairment were associated with sleep disturbances in older adults regardless of the severity of knee OA.

Luisa Cedin, a PhD student at Rush University, Chicago, who attended the presentation, noted the clinical implications of the interaction of daily activities with knee pain.

”I’m a physical therapist, and this could have a significant impact on the performance of the exercises that I’m requiring as a physical therapist,” Ms. Cedin said in an interview. “When you ask somebody who is not getting enough rest during the night – not only enough time but enough quality of rest – we know that we can expect a lower performance with any type of exercises, whether it’s less strength or force, less power, less agility, or less resistance or endurance, so this has a big impact on their quality of life.”

Mr. Sasahara cited research noting that acute pain occurs at the beginning of movement and during weight bearing and walking while chronic pain frequently occurs at night and in early morning awakenings. The prevalence of sleep disturbances in patients with chronic pain ranges from 50% to 80%, he said, and past evidence has shown the relationship between sleep and pain to be bidirectional.

For example, insomnia frequency and severity, sleep-onset problems, and sleep efficiency are all positively associated with pain sensitivity, and increasing severity of OA is linked to increasing prevalence of night knee pain and sleep problems, affecting quality of life, he said.

In this new study examining the relationship between sleep disturbance and knee pain and mobility, the researchers focused specifically on a population of older adults with knee OA. They analyzed data from the Bunkyo Health Study, which was conducted at Juntendo University’s Sportology Center to examine the association between metabolic, cardiovascular, cognitive dysfunction, and motor organ disorders in older adults from November 2015 to September 2018.

From the initial population of 1,630 adults, aged 65-84, who did not need medical treatment because of knee pain, the researchers analyzed data from 1,145 adults who the met this study’s criteria, which included MRI imaging of medial type knee OA. A little over half (55.7%) were women, with an average age of 73 and an average body mass index (BMI) of 22.8 kg/m².

In addition to blood and urine sampling, the researchers determined the severity of knee OA based on joint space width, femorotibial angle, and Kellgren and Lawrence (K/L) grade from x-rays in standing position. They also assessed the structure of knee OA using a whole-organ MRI score (WORMS), and pain and mobility with a visual analog scale, the Japan Knee Osteoarthritis Measure (JKOM), and the 25-question geriatric locomotive function scale.

The JKOM, based on the Western Ontario and McMaster Universities quality of life index for general knee OA, is adjusted to account for the Japanese lifestyle and covers four categories: knee pain and stiffness, a score for activities of daily living, a social activities score, and the patient’s health conditions.

Overall, 41.3% of the participants had sleep disturbances, based on a score of 6 or higher on the Pittsburgh Sleep Quality Index–Japanese. More women (55.7%) than men experienced sleep problems (P < .001), but there were no significant differences in the average age between those who did and those who did not have sleep issues. There were also no significance differences in BMI, joint space width, or femorotibial angle, which was an average 177.5 degrees in group with no sleep problems and 177.6 degrees in the group with sleep disturbances.

The proportion of participants experiencing sleep disturbances increased with increasing K/L grade of OA: 56.8% of those with K/L grade 4 had sleep problems, compared with 40.9% of those with K/L grade 3, 42.1% of those with K/L grade 2, and 33.7% of those with K/L grade 1, resulting in 30% greater odds of sleep disturbance with a higher K/L grade (odds ratio, 1.3; P = .011).

Knee pain at night was also significantly associated with severity of OA based on the K/L grade. While only 6.9% of participants reported pain at night overall, nearly 1 in 3 (29.5%) of those with K/L grade 4 reported pain at night, compared with 3.4% of those with K/L grade 1 (P < .001). (Night pain occurred in 5.4% of those with K/L grade 2 and 16.1% with K/L grade 3.)

However, after adjusting for age, gender, and BMI, the severity of knee OA was not significantly associated with sleep disturbance based on K/L grade, joint space width, femoro-tibial angle, and/or WORMS. But knee pain remained significantly associated with sleep disturbance after adjustment based on the visual analog scale and the JKOM (P < .001 for both).

Sleep problems were also significantly associated with each subcategory of the JKOM after adjustment (P < .001 for all but social activities, which was P = .014).

“Activities of daily living may affect the occurrence of knee pain at night,” Mr. Sasahara said, and “sleep disturbance may also disturb quality of life.” If sleep disturbances related to nighttime knee pain are linked to activities of daily living, then “not only knee pain but also activities of daily living need to be improved in order to improve sleep.”

He noted several of the study’s limitations, including the fact that lifestyle habits and work were not taken into account, nor did the researchers evaluate sleep disturbances potentially resulting from a medical illness. The researchers also only examined knee pain, not pain in other parts of the body.

The research was funded by Juntendo University; the Strategic Research Foundation at Private Universities; KAKENHI from the Ministry of Education, Culture, Sports, Science and Technology of Japan; the Mizuno Sports Promotion Foundation; and the Mitsui Life Social Welfare Foundation. Mr. Sasahara and Ms. Cedin had no disclosures.

DENVER – People with lower expectations of how they would be able to use their knees during work activities after a total knee arthroplasty were more dissatisfied with their knee abilities 6 months after their surgery, according to a study presented at the OARSI 2023 World Congress.

Two out of 10 patients are dissatisfied after total knee arthroplasty, which is increasingly performed in younger and working patients who may have higher demands, presenter Yvonne van Zaanen, a physiotherapist in occupational health and ergonomics and a PhD candidate at Amsterdam University Medical Center, told attendees.

The findings suggest a correlation between patients’ low presurgical expectations of their ability to use their knees and having more difficulty with their knees postoperatively, she said. “We should take better care of working patients with low expectations by managing their preoperative expectations and improving their ability to perform work-related knee-straining activities in rehabilitation,” Ms. van Zaanen told attendees.

The researchers conducted a multicenter, prospective cohort study involving seven hospitals. They surveyed 175 employed individuals aged 18-65 years who were scheduled for a total knee arthroplasty and intended to return to work after their surgery. The first survey occurred before the operation, and the follow-up occurred 6 months after the surgery.

Just over half the participants were women (53%), and the average participant age was 59. Respondents had a mean body mass index (BMI) of 29 kg/m², and had a Knee injury and Osteoarthritis Outcome Score (KOOS) pain score of 42 (on a 0-to-100 scale in which lower scores are worse). About half the respondents (51%) had a job that involved knee-straining activities.

The researchers assessed participants’ ability to perform work-related, knee-straining activities using the Work, Osteoarthritis, or joint-Replacement Questionnaire (WORQ) tool, which considers the following activities: kneeling, crouching, clambering, taking the stairs, walking on rough terrain, working with hands below knee height, standing, lifting or carrying, pushing or pulling, walking on ground level, operating a vehicle, operating foot pedals, and sitting. The 0-to-100 scale rates the difficulty of using knees for each particular activity, with higher scores indicating greater ease and less pain in doing that activity.

Among the 107 patients who expected to be satisfied after their surgery, half (n = 53) were satisfied, compared with 12% (n = 13) who were unsatisfied; the remaining participants (n = 41, 38%) were neither satisfied nor dissatisfied. Among the 24 patients who expected to be dissatisfied after their surgery, one-third (n = 8) were satisfied and 42% (n = 10) were dissatisfied. The remaining 44 patients didn’t expect to be satisfied or dissatisfied before their surgery, and 41% of them were satisfied while 23% were dissatisfied.

The researchers found that patients’ expectation of their satisfaction level going into the surgery was the only preoperative factor to be prognostic for dissatisfaction 6 months after surgery, based on their WORQ score. That is, patients who expected to be dissatisfied before their surgery had approximately five times greater odds of being dissatisfied after their surgery than did those who expected to be satisfied with their ability to do knee-straining activities at work (odds ratio, 5.1; 95% confidence interval, 1.7-15.5). Among those with a WORQ score of 40, indicating a greater expectation of difficulty using their knees postoperatively, 55% were dissatisfied after their surgery, compared with 19% of those with a WORQ score of 85, who expected greater knee ability after their surgery.

The other factors that the researchers examined, which had no effect on WORQ scores, included age, sex, BMI, education, comorbidities, KOOS pain subscale, having a knee-straining job, having needed surgery because of work, or having preoperative sick leave.

One discussion prompted by the presentation focused specifically on individuals’ ability to kneel without much difficulty after their surgery, an activity that’s not typically considered likely, Ms. van Zaanen noted. One audience member, Gillian Hawker, MD, MSc, a professor of medicine in the division of rheumatology at the University of Toronto, questioned whether the field should accept that current reality from surgical intervention. Dr. Hawker described a cohort she had analyzed in which two-thirds of the participants had expected they would be able to kneel after their surgery, regardless of whether it was related to work or other activities.

“Kneeling is important, not just for work; it’s important for culture and religion and lots of other things,” Dr. Hawker said. “How will you help these people to kneel after knee replacement when the surgery isn’t really performed to enable people to do that?” In response, Ms. van Zaanen noted it might not be achievable, as the research literature demonstrates, but Dr. Hawker suggested that is itself problematic.

“I guess what I’m asking is, why are we settling for that? If it’s important to so many people, and an expectation of so many people, why don’t we technologically improve such that, post arthroplasty, people can kneel?”

Another commenter suggested that the study’s findings may not indicate a need to manage patients’ expectations prior to surgery so much as showing that some patients simply have realistic expectations of what they will and will not be able to do after knee replacement.

“Is it possible that people who had low expectations – those who expected to be dissatisfied afterwards – were appropriately understanding that they were likely to be dissatisfied afterwards, in which case, managing their expectations might do nothing for their dissatisfaction afterwards?” the commenter asked. It is likely necessary to conduct additional research about expectations before surgery and experiences after surgery to address that question, Ms. van Zaanen suggested.

Ms. van Zaanen and Dr. Hawker reported having no relevant financial relationships. The presentation did not note any external funding. The Congress was sponsored by the Osteoarthritis Research Society International.

DENVER – People with lower expectations of how they would be able to use their knees during work activities after a total knee arthroplasty were more dissatisfied with their knee abilities 6 months after their surgery, according to a study presented at the OARSI 2023 World Congress.

Two out of 10 patients are dissatisfied after total knee arthroplasty, which is increasingly performed in younger and working patients who may have higher demands, presenter Yvonne van Zaanen, a physiotherapist in occupational health and ergonomics and a PhD candidate at Amsterdam University Medical Center, told attendees.

The findings suggest a correlation between patients’ low presurgical expectations of their ability to use their knees and having more difficulty with their knees postoperatively, she said. “We should take better care of working patients with low expectations by managing their preoperative expectations and improving their ability to perform work-related knee-straining activities in rehabilitation,” Ms. van Zaanen told attendees.

The researchers conducted a multicenter, prospective cohort study involving seven hospitals. They surveyed 175 employed individuals aged 18-65 years who were scheduled for a total knee arthroplasty and intended to return to work after their surgery. The first survey occurred before the operation, and the follow-up occurred 6 months after the surgery.

Just over half the participants were women (53%), and the average participant age was 59. Respondents had a mean body mass index (BMI) of 29 kg/m², and had a Knee injury and Osteoarthritis Outcome Score (KOOS) pain score of 42 (on a 0-to-100 scale in which lower scores are worse). About half the respondents (51%) had a job that involved knee-straining activities.

The researchers assessed participants’ ability to perform work-related, knee-straining activities using the Work, Osteoarthritis, or joint-Replacement Questionnaire (WORQ) tool, which considers the following activities: kneeling, crouching, clambering, taking the stairs, walking on rough terrain, working with hands below knee height, standing, lifting or carrying, pushing or pulling, walking on ground level, operating a vehicle, operating foot pedals, and sitting. The 0-to-100 scale rates the difficulty of using knees for each particular activity, with higher scores indicating greater ease and less pain in doing that activity.

Among the 107 patients who expected to be satisfied after their surgery, half (n = 53) were satisfied, compared with 12% (n = 13) who were unsatisfied; the remaining participants (n = 41, 38%) were neither satisfied nor dissatisfied. Among the 24 patients who expected to be dissatisfied after their surgery, one-third (n = 8) were satisfied and 42% (n = 10) were dissatisfied. The remaining 44 patients didn’t expect to be satisfied or dissatisfied before their surgery, and 41% of them were satisfied while 23% were dissatisfied.

The researchers found that patients’ expectation of their satisfaction level going into the surgery was the only preoperative factor to be prognostic for dissatisfaction 6 months after surgery, based on their WORQ score. That is, patients who expected to be dissatisfied before their surgery had approximately five times greater odds of being dissatisfied after their surgery than did those who expected to be satisfied with their ability to do knee-straining activities at work (odds ratio, 5.1; 95% confidence interval, 1.7-15.5). Among those with a WORQ score of 40, indicating a greater expectation of difficulty using their knees postoperatively, 55% were dissatisfied after their surgery, compared with 19% of those with a WORQ score of 85, who expected greater knee ability after their surgery.

The other factors that the researchers examined, which had no effect on WORQ scores, included age, sex, BMI, education, comorbidities, KOOS pain subscale, having a knee-straining job, having needed surgery because of work, or having preoperative sick leave.

One discussion prompted by the presentation focused specifically on individuals’ ability to kneel without much difficulty after their surgery, an activity that’s not typically considered likely, Ms. van Zaanen noted. One audience member, Gillian Hawker, MD, MSc, a professor of medicine in the division of rheumatology at the University of Toronto, questioned whether the field should accept that current reality from surgical intervention. Dr. Hawker described a cohort she had analyzed in which two-thirds of the participants had expected they would be able to kneel after their surgery, regardless of whether it was related to work or other activities.

“Kneeling is important, not just for work; it’s important for culture and religion and lots of other things,” Dr. Hawker said. “How will you help these people to kneel after knee replacement when the surgery isn’t really performed to enable people to do that?” In response, Ms. van Zaanen noted it might not be achievable, as the research literature demonstrates, but Dr. Hawker suggested that is itself problematic.

“I guess what I’m asking is, why are we settling for that? If it’s important to so many people, and an expectation of so many people, why don’t we technologically improve such that, post arthroplasty, people can kneel?”

Another commenter suggested that the study’s findings may not indicate a need to manage patients’ expectations prior to surgery so much as showing that some patients simply have realistic expectations of what they will and will not be able to do after knee replacement.

“Is it possible that people who had low expectations – those who expected to be dissatisfied afterwards – were appropriately understanding that they were likely to be dissatisfied afterwards, in which case, managing their expectations might do nothing for their dissatisfaction afterwards?” the commenter asked. It is likely necessary to conduct additional research about expectations before surgery and experiences after surgery to address that question, Ms. van Zaanen suggested.

Ms. van Zaanen and Dr. Hawker reported having no relevant financial relationships. The presentation did not note any external funding. The Congress was sponsored by the Osteoarthritis Research Society International.

DENVER – People with lower expectations of how they would be able to use their knees during work activities after a total knee arthroplasty were more dissatisfied with their knee abilities 6 months after their surgery, according to a study presented at the OARSI 2023 World Congress.

Two out of 10 patients are dissatisfied after total knee arthroplasty, which is increasingly performed in younger and working patients who may have higher demands, presenter Yvonne van Zaanen, a physiotherapist in occupational health and ergonomics and a PhD candidate at Amsterdam University Medical Center, told attendees.

The findings suggest a correlation between patients’ low presurgical expectations of their ability to use their knees and having more difficulty with their knees postoperatively, she said. “We should take better care of working patients with low expectations by managing their preoperative expectations and improving their ability to perform work-related knee-straining activities in rehabilitation,” Ms. van Zaanen told attendees.

The researchers conducted a multicenter, prospective cohort study involving seven hospitals. They surveyed 175 employed individuals aged 18-65 years who were scheduled for a total knee arthroplasty and intended to return to work after their surgery. The first survey occurred before the operation, and the follow-up occurred 6 months after the surgery.

Just over half the participants were women (53%), and the average participant age was 59. Respondents had a mean body mass index (BMI) of 29 kg/m², and had a Knee injury and Osteoarthritis Outcome Score (KOOS) pain score of 42 (on a 0-to-100 scale in which lower scores are worse). About half the respondents (51%) had a job that involved knee-straining activities.

The researchers assessed participants’ ability to perform work-related, knee-straining activities using the Work, Osteoarthritis, or joint-Replacement Questionnaire (WORQ) tool, which considers the following activities: kneeling, crouching, clambering, taking the stairs, walking on rough terrain, working with hands below knee height, standing, lifting or carrying, pushing or pulling, walking on ground level, operating a vehicle, operating foot pedals, and sitting. The 0-to-100 scale rates the difficulty of using knees for each particular activity, with higher scores indicating greater ease and less pain in doing that activity.

Among the 107 patients who expected to be satisfied after their surgery, half (n = 53) were satisfied, compared with 12% (n = 13) who were unsatisfied; the remaining participants (n = 41, 38%) were neither satisfied nor dissatisfied. Among the 24 patients who expected to be dissatisfied after their surgery, one-third (n = 8) were satisfied and 42% (n = 10) were dissatisfied. The remaining 44 patients didn’t expect to be satisfied or dissatisfied before their surgery, and 41% of them were satisfied while 23% were dissatisfied.

The researchers found that patients’ expectation of their satisfaction level going into the surgery was the only preoperative factor to be prognostic for dissatisfaction 6 months after surgery, based on their WORQ score. That is, patients who expected to be dissatisfied before their surgery had approximately five times greater odds of being dissatisfied after their surgery than did those who expected to be satisfied with their ability to do knee-straining activities at work (odds ratio, 5.1; 95% confidence interval, 1.7-15.5). Among those with a WORQ score of 40, indicating a greater expectation of difficulty using their knees postoperatively, 55% were dissatisfied after their surgery, compared with 19% of those with a WORQ score of 85, who expected greater knee ability after their surgery.

The other factors that the researchers examined, which had no effect on WORQ scores, included age, sex, BMI, education, comorbidities, KOOS pain subscale, having a knee-straining job, having needed surgery because of work, or having preoperative sick leave.

One discussion prompted by the presentation focused specifically on individuals’ ability to kneel without much difficulty after their surgery, an activity that’s not typically considered likely, Ms. van Zaanen noted. One audience member, Gillian Hawker, MD, MSc, a professor of medicine in the division of rheumatology at the University of Toronto, questioned whether the field should accept that current reality from surgical intervention. Dr. Hawker described a cohort she had analyzed in which two-thirds of the participants had expected they would be able to kneel after their surgery, regardless of whether it was related to work or other activities.

“Kneeling is important, not just for work; it’s important for culture and religion and lots of other things,” Dr. Hawker said. “How will you help these people to kneel after knee replacement when the surgery isn’t really performed to enable people to do that?” In response, Ms. van Zaanen noted it might not be achievable, as the research literature demonstrates, but Dr. Hawker suggested that is itself problematic.

“I guess what I’m asking is, why are we settling for that? If it’s important to so many people, and an expectation of so many people, why don’t we technologically improve such that, post arthroplasty, people can kneel?”

Another commenter suggested that the study’s findings may not indicate a need to manage patients’ expectations prior to surgery so much as showing that some patients simply have realistic expectations of what they will and will not be able to do after knee replacement.

“Is it possible that people who had low expectations – those who expected to be dissatisfied afterwards – were appropriately understanding that they were likely to be dissatisfied afterwards, in which case, managing their expectations might do nothing for their dissatisfaction afterwards?” the commenter asked. It is likely necessary to conduct additional research about expectations before surgery and experiences after surgery to address that question, Ms. van Zaanen suggested.

Ms. van Zaanen and Dr. Hawker reported having no relevant financial relationships. The presentation did not note any external funding. The Congress was sponsored by the Osteoarthritis Research Society International.

DENVER – Initiating exercise therapy early on in people who develop symptoms of knee osteoarthritis – even within their first year of pain or reduced function – is associated with modestly lower pain scores and modestly better function than in those whose symptoms have lasted longer, according to a study presented at the OARSI 2023 World Congress.

Although the benefits of exercise therapy for advanced knee osteoarthritis had already been well established, this study looked specifically at benefits from exercise therapy earlier on, in patients with a shorter duration of symptoms.

“Exercise indeed seems especially beneficial in patients with shorter symptom duration and should therefore be encouraged at first symptom presentation,” Marienke van Middelkoop, PhD, of Erasmus MC Medical University in Rotterdam, the Netherlands, told attendees at the meeting, sponsored by Osteoarthritis Research Society International. “It is, however, still a challenge how we can identify patients but also how we can motivate these patients with early symptoms of osteoarthritis.” She noted that a separate pilot study had experienced difficulty recruiting people with short-term symptom duration.

The researchers compared the effect of exercise therapy and no exercise among adults at least 45 years old with knee osteoarthritis, relying on individual participant data from the STEER OA study, a meta-analysis of 31 studies that involved 4,241 participants. After excluding studies that didn’t report symptom duration, lacked a control group or consent, or focused on hip osteoarthritis, the researchers ended up with 10 studies involving 1,895 participants. These participants were stratified based on the duration of their symptoms: up to 1 year (14.4%), 1-2 years (11%), and 2 years or longer (74%).

About two-thirds of the participants were women (65.9%), with an average age of 65 years and an average body mass index (BMI) of 30.7 kg/m². Any land-based or water-based therapeutic exercise counted for the 62% of participants in the intervention group, while the control group had no exercise. Outcomes were assessed based on self-reported pain or physical function at short-term and long-term follow-up, which were as close as possible to 3 months for short-term and the closest date to 12 months for longer term. At baseline, the participants reported an average pain score of 41.7 on a 0-to-100 scale and an average physical function score of 37.4 on a 0-to-100 scale where lower scores indicate better function.

Among those doing exercise therapy, average pain scores dropped 4.56 points in the short term and 7.43 points in the long term. Short-term and long-term pain scores were lower among those whose symptom durations were shorter. For example, those with symptoms for less than a year reported a short-term pain score of 29, compared with 30 for those with 1-2 years of pain and 32 for those with at least 2 years of pain. Results were similar for long-term pain (a score of 26, compared with 28 and 33, respectively).

Participants engaging in exercise therapy also improved average function scores, with a pattern of improvement that was similar to pain scores based on patients’ symptom duration. The average short-term function score was 26 among those with less than a year of symptoms, compared with 28 for those with symptoms for 1-2 years, and 30 for those with symptoms for at least 2 years. Longer-term function scores were 21, 24, and 29, respectively, based on increasing symptom durations.

Chris Yun Lane, PT, DPT, a physical therapist and a fourth-year PhD student at the University of North Carolina at Chapel Hill, was not surprised at the exercise benefit given the extensive evidence already showing that exercise is beneficial for patients with osteoarthritis whose symptoms have lasted longer.

“Just spending a little bit of time on education, designing kind of simple exercise programs, such as walking programs, can be very helpful,” Dr. Lane said in an interview. “Of course, some of it is dependent on the patient itself, but strengthening range of motion is often very helpful.” Dr. Lane said it’s particularly important for physicians and physical therapists to emphasize the importance of exercise to their patients because that guidance doesn’t always occur as often as it should.

Ron Ellis Jr., DO, MBA, chief strategy officer of Pacira BioSciences in Tampa, Fla., noted that a lot of patients with knee osteoarthritis have weakness in their quads, so quad strengthening is “a typical part of our improvement program for patients with osteoarthritis,” he said in an interview. Dr. Ellis also referenced a session he attended the previous day that showed exercise results in reduced inflammation.

“So you may not have weight loss, but you can lower the inflammatory state of the overall body and of the specific joints,” Dr. Ellis said, “so that would support [this study’s] conclusion.”

The STEER OA study was funded by the Chartered Society of Physiotherapy Charitable Trust and the National Institute for Health Research School of Primary Care Research. Dr. van Middelkoop and Dr. Lane both reported having no relevant financial relationships.

DENVER – Initiating exercise therapy early on in people who develop symptoms of knee osteoarthritis – even within their first year of pain or reduced function – is associated with modestly lower pain scores and modestly better function than in those whose symptoms have lasted longer, according to a study presented at the OARSI 2023 World Congress.

Although the benefits of exercise therapy for advanced knee osteoarthritis had already been well established, this study looked specifically at benefits from exercise therapy earlier on, in patients with a shorter duration of symptoms.

“Exercise indeed seems especially beneficial in patients with shorter symptom duration and should therefore be encouraged at first symptom presentation,” Marienke van Middelkoop, PhD, of Erasmus MC Medical University in Rotterdam, the Netherlands, told attendees at the meeting, sponsored by Osteoarthritis Research Society International. “It is, however, still a challenge how we can identify patients but also how we can motivate these patients with early symptoms of osteoarthritis.” She noted that a separate pilot study had experienced difficulty recruiting people with short-term symptom duration.

The researchers compared the effect of exercise therapy and no exercise among adults at least 45 years old with knee osteoarthritis, relying on individual participant data from the STEER OA study, a meta-analysis of 31 studies that involved 4,241 participants. After excluding studies that didn’t report symptom duration, lacked a control group or consent, or focused on hip osteoarthritis, the researchers ended up with 10 studies involving 1,895 participants. These participants were stratified based on the duration of their symptoms: up to 1 year (14.4%), 1-2 years (11%), and 2 years or longer (74%).

About two-thirds of the participants were women (65.9%), with an average age of 65 years and an average body mass index (BMI) of 30.7 kg/m². Any land-based or water-based therapeutic exercise counted for the 62% of participants in the intervention group, while the control group had no exercise. Outcomes were assessed based on self-reported pain or physical function at short-term and long-term follow-up, which were as close as possible to 3 months for short-term and the closest date to 12 months for longer term. At baseline, the participants reported an average pain score of 41.7 on a 0-to-100 scale and an average physical function score of 37.4 on a 0-to-100 scale where lower scores indicate better function.

Among those doing exercise therapy, average pain scores dropped 4.56 points in the short term and 7.43 points in the long term. Short-term and long-term pain scores were lower among those whose symptom durations were shorter. For example, those with symptoms for less than a year reported a short-term pain score of 29, compared with 30 for those with 1-2 years of pain and 32 for those with at least 2 years of pain. Results were similar for long-term pain (a score of 26, compared with 28 and 33, respectively).

Participants engaging in exercise therapy also improved average function scores, with a pattern of improvement that was similar to pain scores based on patients’ symptom duration. The average short-term function score was 26 among those with less than a year of symptoms, compared with 28 for those with symptoms for 1-2 years, and 30 for those with symptoms for at least 2 years. Longer-term function scores were 21, 24, and 29, respectively, based on increasing symptom durations.

Chris Yun Lane, PT, DPT, a physical therapist and a fourth-year PhD student at the University of North Carolina at Chapel Hill, was not surprised at the exercise benefit given the extensive evidence already showing that exercise is beneficial for patients with osteoarthritis whose symptoms have lasted longer.

“Just spending a little bit of time on education, designing kind of simple exercise programs, such as walking programs, can be very helpful,” Dr. Lane said in an interview. “Of course, some of it is dependent on the patient itself, but strengthening range of motion is often very helpful.” Dr. Lane said it’s particularly important for physicians and physical therapists to emphasize the importance of exercise to their patients because that guidance doesn’t always occur as often as it should.

Ron Ellis Jr., DO, MBA, chief strategy officer of Pacira BioSciences in Tampa, Fla., noted that a lot of patients with knee osteoarthritis have weakness in their quads, so quad strengthening is “a typical part of our improvement program for patients with osteoarthritis,” he said in an interview. Dr. Ellis also referenced a session he attended the previous day that showed exercise results in reduced inflammation.

“So you may not have weight loss, but you can lower the inflammatory state of the overall body and of the specific joints,” Dr. Ellis said, “so that would support [this study’s] conclusion.”

The STEER OA study was funded by the Chartered Society of Physiotherapy Charitable Trust and the National Institute for Health Research School of Primary Care Research. Dr. van Middelkoop and Dr. Lane both reported having no relevant financial relationships.

DENVER – Initiating exercise therapy early on in people who develop symptoms of knee osteoarthritis – even within their first year of pain or reduced function – is associated with modestly lower pain scores and modestly better function than in those whose symptoms have lasted longer, according to a study presented at the OARSI 2023 World Congress.

Although the benefits of exercise therapy for advanced knee osteoarthritis had already been well established, this study looked specifically at benefits from exercise therapy earlier on, in patients with a shorter duration of symptoms.

“Exercise indeed seems especially beneficial in patients with shorter symptom duration and should therefore be encouraged at first symptom presentation,” Marienke van Middelkoop, PhD, of Erasmus MC Medical University in Rotterdam, the Netherlands, told attendees at the meeting, sponsored by Osteoarthritis Research Society International. “It is, however, still a challenge how we can identify patients but also how we can motivate these patients with early symptoms of osteoarthritis.” She noted that a separate pilot study had experienced difficulty recruiting people with short-term symptom duration.

The researchers compared the effect of exercise therapy and no exercise among adults at least 45 years old with knee osteoarthritis, relying on individual participant data from the STEER OA study, a meta-analysis of 31 studies that involved 4,241 participants. After excluding studies that didn’t report symptom duration, lacked a control group or consent, or focused on hip osteoarthritis, the researchers ended up with 10 studies involving 1,895 participants. These participants were stratified based on the duration of their symptoms: up to 1 year (14.4%), 1-2 years (11%), and 2 years or longer (74%).

About two-thirds of the participants were women (65.9%), with an average age of 65 years and an average body mass index (BMI) of 30.7 kg/m². Any land-based or water-based therapeutic exercise counted for the 62% of participants in the intervention group, while the control group had no exercise. Outcomes were assessed based on self-reported pain or physical function at short-term and long-term follow-up, which were as close as possible to 3 months for short-term and the closest date to 12 months for longer term. At baseline, the participants reported an average pain score of 41.7 on a 0-to-100 scale and an average physical function score of 37.4 on a 0-to-100 scale where lower scores indicate better function.

Among those doing exercise therapy, average pain scores dropped 4.56 points in the short term and 7.43 points in the long term. Short-term and long-term pain scores were lower among those whose symptom durations were shorter. For example, those with symptoms for less than a year reported a short-term pain score of 29, compared with 30 for those with 1-2 years of pain and 32 for those with at least 2 years of pain. Results were similar for long-term pain (a score of 26, compared with 28 and 33, respectively).

Participants engaging in exercise therapy also improved average function scores, with a pattern of improvement that was similar to pain scores based on patients’ symptom duration. The average short-term function score was 26 among those with less than a year of symptoms, compared with 28 for those with symptoms for 1-2 years, and 30 for those with symptoms for at least 2 years. Longer-term function scores were 21, 24, and 29, respectively, based on increasing symptom durations.

Chris Yun Lane, PT, DPT, a physical therapist and a fourth-year PhD student at the University of North Carolina at Chapel Hill, was not surprised at the exercise benefit given the extensive evidence already showing that exercise is beneficial for patients with osteoarthritis whose symptoms have lasted longer.

“Just spending a little bit of time on education, designing kind of simple exercise programs, such as walking programs, can be very helpful,” Dr. Lane said in an interview. “Of course, some of it is dependent on the patient itself, but strengthening range of motion is often very helpful.” Dr. Lane said it’s particularly important for physicians and physical therapists to emphasize the importance of exercise to their patients because that guidance doesn’t always occur as often as it should.

Ron Ellis Jr., DO, MBA, chief strategy officer of Pacira BioSciences in Tampa, Fla., noted that a lot of patients with knee osteoarthritis have weakness in their quads, so quad strengthening is “a typical part of our improvement program for patients with osteoarthritis,” he said in an interview. Dr. Ellis also referenced a session he attended the previous day that showed exercise results in reduced inflammation.

“So you may not have weight loss, but you can lower the inflammatory state of the overall body and of the specific joints,” Dr. Ellis said, “so that would support [this study’s] conclusion.”

The STEER OA study was funded by the Chartered Society of Physiotherapy Charitable Trust and the National Institute for Health Research School of Primary Care Research. Dr. van Middelkoop and Dr. Lane both reported having no relevant financial relationships.

Long-distance runners are often warned that they are wearing out their joints, but a new study found that running mileage, frequency, and pace were not associated with an increased risk of osteoarthritis.

Runners who had undergone knee or hip surgery or had a previous hip or knee injury that prevented running were most likely to have arthritis, researchers found. Family history of arthritis, higher body mass index (BMI), and older age were also associated with increased risk of the condition.

The study was presented at the American Academy of Orthopaedic Surgeons 2023 Annual Meeting.

It has generally been thought that running may increase risk of osteoarthritis because it puts more load on joints than walking or standing, noted Grace Hsiao-Wei Lo, MD, an assistant professor of immunology, allergy, and rheumatology at the Baylor College of Medicine, Houston, who was not involved with the work. Research in this area has yielded mixed results: A 2017 analysis of multiple studies found that competitive runners did have higher rates of arthritis than recreational runners, while another study conducted by Dr. Lo found that runners did not have an increased risk of knee osteoarthritis, compared with nonrunners. A 2018 study showed that marathon runners had lower instances of arthritis, compared with the general population.

In this new study, researchers surveyed 3,804 runners who participated in the 2019 or 2021 Chicago Marathon about their running history, average mileage per week, and average running pace. The survey also asked about known risk factors for osteoarthritis, including BMI, family history of arthritis, and past knee and hip injuries that prevented running.

Runners, on average, were about 44 years old and ran 27.9 miles per week. The largest proportion of respondents had completed 2-5 marathons (37.3%), around 21% of respondents had finished 6-10 marathons, and 17% were running their first marathon. Study participants had an average of 15 years of running experience, 1,892 reported a previous hip or knee injury, and 413 had undergone knee or hip surgery. Overall, 36.4% reported experiencing hip or knee pain in the past year, and 7.3% had been diagnosed with arthritis.

Researchers found that there was no association between the risk of osteoarthritis and weekly mileage, years spent running, number of marathons completed, or running pace. Respondents who had undergone knee or hip surgery had the highest risk of osteoarthritis (odds ratio, 5.85; P < .0001), followed by those with a history of knee or hip injuries that prevented running (OR, 5.04; P < .0001). Other identified risk factors were family history of arthritis (OR, 3.47; P < .0001), BMI (OR, 1.10; P < .0001), and older age (OR, 1.08; P < .0001).

The news should be encouraging for runners, said Matthew Hartwell, MD, an orthopedic surgeon at the University of California, San Francisco, who led the research. If someone does not have injuries or surgeries that keep them from running, “you can still continue to run,” he said. “There may not necessarily be this dose-response relationship where the more you run, the more you break down your knee or your hip.”

Still, 24.2% of runners reported that their physician had advised them to reduce their mileage or stop running altogether. Most runners (94.2%) said they planned to run another marathon.

“The results of this study are consistent with the experiences of many lifelong runners and observations of sports medicine professionals that osteoarthritis is not an inevitable consequence of distance running,” said Brett Toresdahl, MD, a sports medicine physician at the Hospital for Special Surgery in New York, who was not involved with the study.

Still, he emphasized that more research is necessary to understand whether running contributes to the risk of developing osteoarthritis. The participants in the study were current marathoners, he noted, so it is likely they have healthy joints that can tolerate running longer distances. “If there is a subset of people who have joints that are negatively affected by running, they wouldn’t likely be registering for a marathon,” he said in an email interview.

Dr. Lo added that comparing these marathoners to a group who did not run would help assess whether running can be harmful to joints. “To be fair, this is a challenging subject to study,” she said. “Osteoarthritis has a long natural history, and so it is difficult to evaluate this kind of question over many years of running and many years of evaluation of arthritis.”

While the research does not answer the question of whether running can lead to osteoarthritis, it helps show the need for long-term research on how running affects joints over time as well as one’s general health, Dr. Toresdahl noted. “I would not be surprised if future longitudinal research will come to the same conclusion that running for the majority of patients is a net benefit for overall health and at least net neutral for joint health when done in moderation,” he said.

Dr. Hartwell, Dr. Lo, and Dr. Toresdahl report no relevant financial relationships.

A version of this article originally appeared on Medscape.com.

Long-distance runners are often warned that they are wearing out their joints, but a new study found that running mileage, frequency, and pace were not associated with an increased risk of osteoarthritis.

Runners who had undergone knee or hip surgery or had a previous hip or knee injury that prevented running were most likely to have arthritis, researchers found. Family history of arthritis, higher body mass index (BMI), and older age were also associated with increased risk of the condition.

The study was presented at the American Academy of Orthopaedic Surgeons 2023 Annual Meeting.

It has generally been thought that running may increase risk of osteoarthritis because it puts more load on joints than walking or standing, noted Grace Hsiao-Wei Lo, MD, an assistant professor of immunology, allergy, and rheumatology at the Baylor College of Medicine, Houston, who was not involved with the work. Research in this area has yielded mixed results: A 2017 analysis of multiple studies found that competitive runners did have higher rates of arthritis than recreational runners, while another study conducted by Dr. Lo found that runners did not have an increased risk of knee osteoarthritis, compared with nonrunners. A 2018 study showed that marathon runners had lower instances of arthritis, compared with the general population.

In this new study, researchers surveyed 3,804 runners who participated in the 2019 or 2021 Chicago Marathon about their running history, average mileage per week, and average running pace. The survey also asked about known risk factors for osteoarthritis, including BMI, family history of arthritis, and past knee and hip injuries that prevented running.

Runners, on average, were about 44 years old and ran 27.9 miles per week. The largest proportion of respondents had completed 2-5 marathons (37.3%), around 21% of respondents had finished 6-10 marathons, and 17% were running their first marathon. Study participants had an average of 15 years of running experience, 1,892 reported a previous hip or knee injury, and 413 had undergone knee or hip surgery. Overall, 36.4% reported experiencing hip or knee pain in the past year, and 7.3% had been diagnosed with arthritis.

Researchers found that there was no association between the risk of osteoarthritis and weekly mileage, years spent running, number of marathons completed, or running pace. Respondents who had undergone knee or hip surgery had the highest risk of osteoarthritis (odds ratio, 5.85; P < .0001), followed by those with a history of knee or hip injuries that prevented running (OR, 5.04; P < .0001). Other identified risk factors were family history of arthritis (OR, 3.47; P < .0001), BMI (OR, 1.10; P < .0001), and older age (OR, 1.08; P < .0001).

The news should be encouraging for runners, said Matthew Hartwell, MD, an orthopedic surgeon at the University of California, San Francisco, who led the research. If someone does not have injuries or surgeries that keep them from running, “you can still continue to run,” he said. “There may not necessarily be this dose-response relationship where the more you run, the more you break down your knee or your hip.”

Still, 24.2% of runners reported that their physician had advised them to reduce their mileage or stop running altogether. Most runners (94.2%) said they planned to run another marathon.

“The results of this study are consistent with the experiences of many lifelong runners and observations of sports medicine professionals that osteoarthritis is not an inevitable consequence of distance running,” said Brett Toresdahl, MD, a sports medicine physician at the Hospital for Special Surgery in New York, who was not involved with the study.

Still, he emphasized that more research is necessary to understand whether running contributes to the risk of developing osteoarthritis. The participants in the study were current marathoners, he noted, so it is likely they have healthy joints that can tolerate running longer distances. “If there is a subset of people who have joints that are negatively affected by running, they wouldn’t likely be registering for a marathon,” he said in an email interview.

Dr. Lo added that comparing these marathoners to a group who did not run would help assess whether running can be harmful to joints. “To be fair, this is a challenging subject to study,” she said. “Osteoarthritis has a long natural history, and so it is difficult to evaluate this kind of question over many years of running and many years of evaluation of arthritis.”

While the research does not answer the question of whether running can lead to osteoarthritis, it helps show the need for long-term research on how running affects joints over time as well as one’s general health, Dr. Toresdahl noted. “I would not be surprised if future longitudinal research will come to the same conclusion that running for the majority of patients is a net benefit for overall health and at least net neutral for joint health when done in moderation,” he said.

Dr. Hartwell, Dr. Lo, and Dr. Toresdahl report no relevant financial relationships.

A version of this article originally appeared on Medscape.com.

Long-distance runners are often warned that they are wearing out their joints, but a new study found that running mileage, frequency, and pace were not associated with an increased risk of osteoarthritis.

Runners who had undergone knee or hip surgery or had a previous hip or knee injury that prevented running were most likely to have arthritis, researchers found. Family history of arthritis, higher body mass index (BMI), and older age were also associated with increased risk of the condition.

The study was presented at the American Academy of Orthopaedic Surgeons 2023 Annual Meeting.

It has generally been thought that running may increase risk of osteoarthritis because it puts more load on joints than walking or standing, noted Grace Hsiao-Wei Lo, MD, an assistant professor of immunology, allergy, and rheumatology at the Baylor College of Medicine, Houston, who was not involved with the work. Research in this area has yielded mixed results: A 2017 analysis of multiple studies found that competitive runners did have higher rates of arthritis than recreational runners, while another study conducted by Dr. Lo found that runners did not have an increased risk of knee osteoarthritis, compared with nonrunners. A 2018 study showed that marathon runners had lower instances of arthritis, compared with the general population.

In this new study, researchers surveyed 3,804 runners who participated in the 2019 or 2021 Chicago Marathon about their running history, average mileage per week, and average running pace. The survey also asked about known risk factors for osteoarthritis, including BMI, family history of arthritis, and past knee and hip injuries that prevented running.

Runners, on average, were about 44 years old and ran 27.9 miles per week. The largest proportion of respondents had completed 2-5 marathons (37.3%), around 21% of respondents had finished 6-10 marathons, and 17% were running their first marathon. Study participants had an average of 15 years of running experience, 1,892 reported a previous hip or knee injury, and 413 had undergone knee or hip surgery. Overall, 36.4% reported experiencing hip or knee pain in the past year, and 7.3% had been diagnosed with arthritis.

Researchers found that there was no association between the risk of osteoarthritis and weekly mileage, years spent running, number of marathons completed, or running pace. Respondents who had undergone knee or hip surgery had the highest risk of osteoarthritis (odds ratio, 5.85; P < .0001), followed by those with a history of knee or hip injuries that prevented running (OR, 5.04; P < .0001). Other identified risk factors were family history of arthritis (OR, 3.47; P < .0001), BMI (OR, 1.10; P < .0001), and older age (OR, 1.08; P < .0001).

The news should be encouraging for runners, said Matthew Hartwell, MD, an orthopedic surgeon at the University of California, San Francisco, who led the research. If someone does not have injuries or surgeries that keep them from running, “you can still continue to run,” he said. “There may not necessarily be this dose-response relationship where the more you run, the more you break down your knee or your hip.”

Still, 24.2% of runners reported that their physician had advised them to reduce their mileage or stop running altogether. Most runners (94.2%) said they planned to run another marathon.

“The results of this study are consistent with the experiences of many lifelong runners and observations of sports medicine professionals that osteoarthritis is not an inevitable consequence of distance running,” said Brett Toresdahl, MD, a sports medicine physician at the Hospital for Special Surgery in New York, who was not involved with the study.

Still, he emphasized that more research is necessary to understand whether running contributes to the risk of developing osteoarthritis. The participants in the study were current marathoners, he noted, so it is likely they have healthy joints that can tolerate running longer distances. “If there is a subset of people who have joints that are negatively affected by running, they wouldn’t likely be registering for a marathon,” he said in an email interview.

Dr. Lo added that comparing these marathoners to a group who did not run would help assess whether running can be harmful to joints. “To be fair, this is a challenging subject to study,” she said. “Osteoarthritis has a long natural history, and so it is difficult to evaluate this kind of question over many years of running and many years of evaluation of arthritis.”

While the research does not answer the question of whether running can lead to osteoarthritis, it helps show the need for long-term research on how running affects joints over time as well as one’s general health, Dr. Toresdahl noted. “I would not be surprised if future longitudinal research will come to the same conclusion that running for the majority of patients is a net benefit for overall health and at least net neutral for joint health when done in moderation,” he said.

Dr. Hartwell, Dr. Lo, and Dr. Toresdahl report no relevant financial relationships.

A version of this article originally appeared on Medscape.com.

Patients with moderate to severe osteoarthritis (OA) or osteonecrosis (ON) eligible for total joint arthroplasty (TJA) who have failed one or more nonoperative therapies should proceed directly to surgery, according to new guidelines from the American College of Rheumatology and the American Association of Hip and Knee Surgeons.

“One of the reasons for creating this guideline was that many patients have been subjected to delays for surgery after completing nonoperative therapy, despite persistent moderate to severe pain, loss of function, and moderate to severe radiographic OA or ON,” said coauthors Susan M. Goodman, MD, a rheumatologist at Hospital for Special Surgery in New York, and Charles Hannon, MD, an orthopedic surgeon at Washington University in St. Louis, in an email interview with this news organization. “This guideline supports surgery being performed in an expeditious fashion after the decision has been made to proceed with surgery by both the physician and patient through a shared decision-making process,” they said.

The guidelines also state that obesity by itself should not be a reason to delay TJA. “We could not find a rationale for a strict cut off for weight/body mass index (BMI). Our literature review revealed that though many adverse events were, in fact, increased in patients with morbid obesity, there is also an increase in adverse events for those who had bariatric surgery prior to their arthroplasty,” they added, noting that patients need to be made aware of the increased risk for adverse events in patients with obesity. Though the guidelines do not pose any BMI cutoffs, they state that weight loss should be “strongly encouraged.” These new recommendations are conditional, and all had a “low” to “very low” certainty of evidence; however, there was high consensus on the recommendations from the expert panel.

The guidelines also recommended:

• Delaying TJA to achieve smoking and nicotine cessation or reduction.
• Delaying TJA to improve glycemic control in patients with diabetes, although the group did not recommend any specific measure or threshold.
• Not delaying TJA in patients with a severe deformity, bone loss, or a neuropathic joint.

The new guidelines formalize what many surgeons have already been doing for the past few years, said Arjun Saxena, MD, MBA, an orthopedic surgeon in Philadelphia who was not involved with the guidelines. “A lot of total joint programs have really focused on patient optimization, including smoking cessation, glycemic control, and weight loss prior to surgery,” he said.

Most importantly, the guidelines put an emphasis on how the decision to proceed with TJA should be a shared decision between a physician and patient, he added. Some insurance companies with prior authorization policies may require a patient to try additional nonoperative therapies before approving surgery, creating barriers to care, he said. “Hopefully [these new recommendations] will help third parties understand that joint replacement is a big decision – most doctors aren’t going to recommend that unless it’s necessary or something that is going to help patients,” he said. “I understand that there is a certain need for preauthorization, but just having strict guidelines isn’t appropriate. You really need to look at the whole picture,” he added.

The full manuscript has been submitted for review and is expected to be jointly published in American College of Rheumatology and the American Association of Hip and Knee Surgeons journals later this year.

Dr. Saxena consults for the orthopedic implant company Corin.

A version of this article originally appeared on Medscape.com.

Patients with moderate to severe osteoarthritis (OA) or osteonecrosis (ON) eligible for total joint arthroplasty (TJA) who have failed one or more nonoperative therapies should proceed directly to surgery, according to new guidelines from the American College of Rheumatology and the American Association of Hip and Knee Surgeons.

“One of the reasons for creating this guideline was that many patients have been subjected to delays for surgery after completing nonoperative therapy, despite persistent moderate to severe pain, loss of function, and moderate to severe radiographic OA or ON,” said coauthors Susan M. Goodman, MD, a rheumatologist at Hospital for Special Surgery in New York, and Charles Hannon, MD, an orthopedic surgeon at Washington University in St. Louis, in an email interview with this news organization. “This guideline supports surgery being performed in an expeditious fashion after the decision has been made to proceed with surgery by both the physician and patient through a shared decision-making process,” they said.

The guidelines also state that obesity by itself should not be a reason to delay TJA. “We could not find a rationale for a strict cut off for weight/body mass index (BMI). Our literature review revealed that though many adverse events were, in fact, increased in patients with morbid obesity, there is also an increase in adverse events for those who had bariatric surgery prior to their arthroplasty,” they added, noting that patients need to be made aware of the increased risk for adverse events in patients with obesity. Though the guidelines do not pose any BMI cutoffs, they state that weight loss should be “strongly encouraged.” These new recommendations are conditional, and all had a “low” to “very low” certainty of evidence; however, there was high consensus on the recommendations from the expert panel.

The guidelines also recommended:

• Delaying TJA to achieve smoking and nicotine cessation or reduction.
• Delaying TJA to improve glycemic control in patients with diabetes, although the group did not recommend any specific measure or threshold.
• Not delaying TJA in patients with a severe deformity, bone loss, or a neuropathic joint.

The new guidelines formalize what many surgeons have already been doing for the past few years, said Arjun Saxena, MD, MBA, an orthopedic surgeon in Philadelphia who was not involved with the guidelines. “A lot of total joint programs have really focused on patient optimization, including smoking cessation, glycemic control, and weight loss prior to surgery,” he said.

Most importantly, the guidelines put an emphasis on how the decision to proceed with TJA should be a shared decision between a physician and patient, he added. Some insurance companies with prior authorization policies may require a patient to try additional nonoperative therapies before approving surgery, creating barriers to care, he said. “Hopefully [these new recommendations] will help third parties understand that joint replacement is a big decision – most doctors aren’t going to recommend that unless it’s necessary or something that is going to help patients,” he said. “I understand that there is a certain need for preauthorization, but just having strict guidelines isn’t appropriate. You really need to look at the whole picture,” he added.

The full manuscript has been submitted for review and is expected to be jointly published in American College of Rheumatology and the American Association of Hip and Knee Surgeons journals later this year.

Dr. Saxena consults for the orthopedic implant company Corin.

A version of this article originally appeared on Medscape.com.

Patients with moderate to severe osteoarthritis (OA) or osteonecrosis (ON) eligible for total joint arthroplasty (TJA) who have failed one or more nonoperative therapies should proceed directly to surgery, according to new guidelines from the American College of Rheumatology and the American Association of Hip and Knee Surgeons.

“One of the reasons for creating this guideline was that many patients have been subjected to delays for surgery after completing nonoperative therapy, despite persistent moderate to severe pain, loss of function, and moderate to severe radiographic OA or ON,” said coauthors Susan M. Goodman, MD, a rheumatologist at Hospital for Special Surgery in New York, and Charles Hannon, MD, an orthopedic surgeon at Washington University in St. Louis, in an email interview with this news organization. “This guideline supports surgery being performed in an expeditious fashion after the decision has been made to proceed with surgery by both the physician and patient through a shared decision-making process,” they said.

The guidelines also state that obesity by itself should not be a reason to delay TJA. “We could not find a rationale for a strict cut off for weight/body mass index (BMI). Our literature review revealed that though many adverse events were, in fact, increased in patients with morbid obesity, there is also an increase in adverse events for those who had bariatric surgery prior to their arthroplasty,” they added, noting that patients need to be made aware of the increased risk for adverse events in patients with obesity. Though the guidelines do not pose any BMI cutoffs, they state that weight loss should be “strongly encouraged.” These new recommendations are conditional, and all had a “low” to “very low” certainty of evidence; however, there was high consensus on the recommendations from the expert panel.

The guidelines also recommended:

• Delaying TJA to achieve smoking and nicotine cessation or reduction.
• Delaying TJA to improve glycemic control in patients with diabetes, although the group did not recommend any specific measure or threshold.
• Not delaying TJA in patients with a severe deformity, bone loss, or a neuropathic joint.

The new guidelines formalize what many surgeons have already been doing for the past few years, said Arjun Saxena, MD, MBA, an orthopedic surgeon in Philadelphia who was not involved with the guidelines. “A lot of total joint programs have really focused on patient optimization, including smoking cessation, glycemic control, and weight loss prior to surgery,” he said.

Most importantly, the guidelines put an emphasis on how the decision to proceed with TJA should be a shared decision between a physician and patient, he added. Some insurance companies with prior authorization policies may require a patient to try additional nonoperative therapies before approving surgery, creating barriers to care, he said. “Hopefully [these new recommendations] will help third parties understand that joint replacement is a big decision – most doctors aren’t going to recommend that unless it’s necessary or something that is going to help patients,” he said. “I understand that there is a certain need for preauthorization, but just having strict guidelines isn’t appropriate. You really need to look at the whole picture,” he added.

The full manuscript has been submitted for review and is expected to be jointly published in American College of Rheumatology and the American Association of Hip and Knee Surgeons journals later this year.

Dr. Saxena consults for the orthopedic implant company Corin.

A version of this article originally appeared on Medscape.com.

Running does not appear to cause sustained wear and tear of healthy knee cartilage, with research suggesting that the small, short-term changes to cartilage after a run reverse within hours.

A systematic review and meta-analysis published in the most recent issue of Osteoarthritis and Cartilage presents the findings involving 396 adults, which compared the “before” and “after” state of healthy knee cartilage in runners.

pojoslaw/Thinkstock

Running is often thought to be detrimental to joint health, wrote Sally Coburn, PhD candidate at the La Trobe Sport & Exercise Medicine Research Centre at La Trobe University in Melbourne and coauthors, but this perception is not supported by evidence.

For the analysis, the researchers included studies that looked at either knee or hip cartilage using MRI to assess its size, shape, structure, and/or composition both in the 48 hours before a single bout of running and in the 48 hours after. The analysis aimed to include adults with or at risk of osteoarthritis, but only 57 of the 446 knees in the analysis fit these criteria.

In studies where participants underwent MRI within 20 minutes of running, there was an immediate postrun decrease in the volume of cartilage, ranging from –3.3% for weight-bearing femoral cartilage to –4.1% for tibial cartilage volume. This also revealed a decrease in T1 and T2 relaxation times, which are specialized MRI measures that reflect the composition of cartilage and which can indicate a breakdown of cartilage structure in the case of diseases such as arthritis.

Reversal of short-term cartilage changes

However, within 48 hours of the run, data from studies that repeated the MRIs more than once after the initial prerun scan suggested these changes reversed back to prerun levels.

“We were able to pool delayed T2 relaxation time measures from studies that repeated scans of the same participants 60 minutes and 91 minutes post-run and found no effect of running on tibiofemoral joint cartilage composition,” the authors write.

For example, one study in marathon runners found no difference in cartilage thickness in the tibiofemoral joint between baseline and at 2-10 hours and 12 hours after the marathon. Another showed the immediate post-run decrease in patellofemoral joint cartilage thickness had reverted back to prerun levels when the scan was repeated 24 hours after the run.

“The changes are very minimal and not inconsistent with what’s expected for your cartilage which is functioning normally,” Ms. Coburn told this news organization.

Sparse data in people with osteoarthritis

The authors said there were not enough data from individuals with osteoarthritis to be able to pool and quantify their cartilage changes. However, one study in the analysis found that cartilage lesions in people considered at risk of osteoarthritis because of prior anterior cruciate ligament reconstruction were unchanged after running.

Another suggested that the decrease in femoral cartilage volume recorded at 15 minutes persisted at 45 minutes, while a separate study found significantly increased T2 relaxation times at 45 minutes after a run in those with knee osteoarthritis but not in those without osteoarthritis.

Senior author Adam Culvenor, PhD, senior research fellow at the La Trobe Centre, said their analysis suggested running was healthy, with small changes in cartilage that resolve quickly, but “we really don’t know yet if running is safe for people with osteoarthritis,” he said. “We need much more work in that space.”

Overall, the study evidence was rated as being of low certainty, which Dr. Coburn said was related to the small numbers in each study, which in turn relates to the cost and logistical challenges of the specialized MRI scan used.

“Study of a repeated exposure over a long duration of time on a disease that has a long natural history, like osteoarthritis, is challenging in that most funding agencies will not fund studies longer than 5 years,” Grace Hsiao-Wei Lo, MD, of the department of immunology, allergy, and rheumatology at the Baylor College of Medicine in Houston, said in an email.

Dr. Lo, who was not involved with this review and meta-analysis, said there are still concerns about the effect of running on knee osteoarthritis among those with the disease, although there are some data to suggest that among those who self-select to run, there are no negative outcomes for the knee.

An accompanying editorial noted that research into the effect of running on those with osteoarthritis was still in its infancy. “This would help to guide clinical practice on how to support people with osteoarthritis, with regard to accessing the health benefits of running participation,” write Jean-Francois Esculier, PT, PhD, from the University of British Columbia, Vancouver, and Christian Barton, PhD, with the La Trobe Centre, pointing out there were a lack of evidence-based clinical recommendations for people with osteoarthritis who want to start or continue running.

It’s a question that PhD candidate Michaela Khan, MSc, is trying to answer at the University of British Columbia. “Our lab did a pilot study for my current study now, and they found that osteoarthritic cartilage took a little bit longer to recover than their healthy counterparts,” Ms. Khan said. Her research is suggesting that people with osteoarthritis not only can run, but even those with severe disease, who might be candidates for knee replacement, can run long distances.

Commenting on the analysis, Ms. Khan said the main take-home message was that healthy cartilage seems to recover after running, and that there is not an ongoing effect of ‘wear and tear.’

“That’s changing the narrative that if you keep running, it will wear away your cartilage, it’ll hurt your knees,” she said. “Now, we have a good synthesis of scientific evidence to prove maybe otherwise.”

Ms. Coburn and Dr. Culvenor report grant support from the National Health & Medical Research Council of Australia, and another author reports grant support from the U.S. National Institute of Arthritis and Musculoskeletal and Skin Diseases. The authors, as well as Dr. Lo and Ms. Khan, report relevant financial relationships.
 

Running does not appear to cause sustained wear and tear of healthy knee cartilage, with research suggesting that the small, short-term changes to cartilage after a run reverse within hours.

A systematic review and meta-analysis published in the most recent issue of Osteoarthritis and Cartilage presents the findings involving 396 adults, which compared the “before” and “after” state of healthy knee cartilage in runners.

pojoslaw/Thinkstock

Running is often thought to be detrimental to joint health, wrote Sally Coburn, PhD candidate at the La Trobe Sport & Exercise Medicine Research Centre at La Trobe University in Melbourne and coauthors, but this perception is not supported by evidence.

For the analysis, the researchers included studies that looked at either knee or hip cartilage using MRI to assess its size, shape, structure, and/or composition both in the 48 hours before a single bout of running and in the 48 hours after. The analysis aimed to include adults with or at risk of osteoarthritis, but only 57 of the 446 knees in the analysis fit these criteria.

In studies where participants underwent MRI within 20 minutes of running, there was an immediate postrun decrease in the volume of cartilage, ranging from –3.3% for weight-bearing femoral cartilage to –4.1% for tibial cartilage volume. This also revealed a decrease in T1 and T2 relaxation times, which are specialized MRI measures that reflect the composition of cartilage and which can indicate a breakdown of cartilage structure in the case of diseases such as arthritis.

Reversal of short-term cartilage changes

However, within 48 hours of the run, data from studies that repeated the MRIs more than once after the initial prerun scan suggested these changes reversed back to prerun levels.

“We were able to pool delayed T2 relaxation time measures from studies that repeated scans of the same participants 60 minutes and 91 minutes post-run and found no effect of running on tibiofemoral joint cartilage composition,” the authors write.

For example, one study in marathon runners found no difference in cartilage thickness in the tibiofemoral joint between baseline and at 2-10 hours and 12 hours after the marathon. Another showed the immediate post-run decrease in patellofemoral joint cartilage thickness had reverted back to prerun levels when the scan was repeated 24 hours after the run.

“The changes are very minimal and not inconsistent with what’s expected for your cartilage which is functioning normally,” Ms. Coburn told this news organization.

Sparse data in people with osteoarthritis

The authors said there were not enough data from individuals with osteoarthritis to be able to pool and quantify their cartilage changes. However, one study in the analysis found that cartilage lesions in people considered at risk of osteoarthritis because of prior anterior cruciate ligament reconstruction were unchanged after running.

Another suggested that the decrease in femoral cartilage volume recorded at 15 minutes persisted at 45 minutes, while a separate study found significantly increased T2 relaxation times at 45 minutes after a run in those with knee osteoarthritis but not in those without osteoarthritis.

Senior author Adam Culvenor, PhD, senior research fellow at the La Trobe Centre, said their analysis suggested running was healthy, with small changes in cartilage that resolve quickly, but “we really don’t know yet if running is safe for people with osteoarthritis,” he said. “We need much more work in that space.”

Overall, the study evidence was rated as being of low certainty, which Dr. Coburn said was related to the small numbers in each study, which in turn relates to the cost and logistical challenges of the specialized MRI scan used.

“Study of a repeated exposure over a long duration of time on a disease that has a long natural history, like osteoarthritis, is challenging in that most funding agencies will not fund studies longer than 5 years,” Grace Hsiao-Wei Lo, MD, of the department of immunology, allergy, and rheumatology at the Baylor College of Medicine in Houston, said in an email.

Dr. Lo, who was not involved with this review and meta-analysis, said there are still concerns about the effect of running on knee osteoarthritis among those with the disease, although there are some data to suggest that among those who self-select to run, there are no negative outcomes for the knee.

An accompanying editorial noted that research into the effect of running on those with osteoarthritis was still in its infancy. “This would help to guide clinical practice on how to support people with osteoarthritis, with regard to accessing the health benefits of running participation,” write Jean-Francois Esculier, PT, PhD, from the University of British Columbia, Vancouver, and Christian Barton, PhD, with the La Trobe Centre, pointing out there were a lack of evidence-based clinical recommendations for people with osteoarthritis who want to start or continue running.

It’s a question that PhD candidate Michaela Khan, MSc, is trying to answer at the University of British Columbia. “Our lab did a pilot study for my current study now, and they found that osteoarthritic cartilage took a little bit longer to recover than their healthy counterparts,” Ms. Khan said. Her research is suggesting that people with osteoarthritis not only can run, but even those with severe disease, who might be candidates for knee replacement, can run long distances.

Commenting on the analysis, Ms. Khan said the main take-home message was that healthy cartilage seems to recover after running, and that there is not an ongoing effect of ‘wear and tear.’

“That’s changing the narrative that if you keep running, it will wear away your cartilage, it’ll hurt your knees,” she said. “Now, we have a good synthesis of scientific evidence to prove maybe otherwise.”

Ms. Coburn and Dr. Culvenor report grant support from the National Health & Medical Research Council of Australia, and another author reports grant support from the U.S. National Institute of Arthritis and Musculoskeletal and Skin Diseases. The authors, as well as Dr. Lo and Ms. Khan, report relevant financial relationships.
 

Running does not appear to cause sustained wear and tear of healthy knee cartilage, with research suggesting that the small, short-term changes to cartilage after a run reverse within hours.

A systematic review and meta-analysis published in the most recent issue of Osteoarthritis and Cartilage presents the findings involving 396 adults, which compared the “before” and “after” state of healthy knee cartilage in runners.

pojoslaw/Thinkstock

Running is often thought to be detrimental to joint health, wrote Sally Coburn, PhD candidate at the La Trobe Sport & Exercise Medicine Research Centre at La Trobe University in Melbourne and coauthors, but this perception is not supported by evidence.

For the analysis, the researchers included studies that looked at either knee or hip cartilage using MRI to assess its size, shape, structure, and/or composition both in the 48 hours before a single bout of running and in the 48 hours after. The analysis aimed to include adults with or at risk of osteoarthritis, but only 57 of the 446 knees in the analysis fit these criteria.

In studies where participants underwent MRI within 20 minutes of running, there was an immediate postrun decrease in the volume of cartilage, ranging from –3.3% for weight-bearing femoral cartilage to –4.1% for tibial cartilage volume. This also revealed a decrease in T1 and T2 relaxation times, which are specialized MRI measures that reflect the composition of cartilage and which can indicate a breakdown of cartilage structure in the case of diseases such as arthritis.

Reversal of short-term cartilage changes

However, within 48 hours of the run, data from studies that repeated the MRIs more than once after the initial prerun scan suggested these changes reversed back to prerun levels.

“We were able to pool delayed T2 relaxation time measures from studies that repeated scans of the same participants 60 minutes and 91 minutes post-run and found no effect of running on tibiofemoral joint cartilage composition,” the authors write.

For example, one study in marathon runners found no difference in cartilage thickness in the tibiofemoral joint between baseline and at 2-10 hours and 12 hours after the marathon. Another showed the immediate post-run decrease in patellofemoral joint cartilage thickness had reverted back to prerun levels when the scan was repeated 24 hours after the run.

“The changes are very minimal and not inconsistent with what’s expected for your cartilage which is functioning normally,” Ms. Coburn told this news organization.

Sparse data in people with osteoarthritis

The authors said there were not enough data from individuals with osteoarthritis to be able to pool and quantify their cartilage changes. However, one study in the analysis found that cartilage lesions in people considered at risk of osteoarthritis because of prior anterior cruciate ligament reconstruction were unchanged after running.

Another suggested that the decrease in femoral cartilage volume recorded at 15 minutes persisted at 45 minutes, while a separate study found significantly increased T2 relaxation times at 45 minutes after a run in those with knee osteoarthritis but not in those without osteoarthritis.

Senior author Adam Culvenor, PhD, senior research fellow at the La Trobe Centre, said their analysis suggested running was healthy, with small changes in cartilage that resolve quickly, but “we really don’t know yet if running is safe for people with osteoarthritis,” he said. “We need much more work in that space.”

Overall, the study evidence was rated as being of low certainty, which Dr. Coburn said was related to the small numbers in each study, which in turn relates to the cost and logistical challenges of the specialized MRI scan used.

“Study of a repeated exposure over a long duration of time on a disease that has a long natural history, like osteoarthritis, is challenging in that most funding agencies will not fund studies longer than 5 years,” Grace Hsiao-Wei Lo, MD, of the department of immunology, allergy, and rheumatology at the Baylor College of Medicine in Houston, said in an email.

Dr. Lo, who was not involved with this review and meta-analysis, said there are still concerns about the effect of running on knee osteoarthritis among those with the disease, although there are some data to suggest that among those who self-select to run, there are no negative outcomes for the knee.

An accompanying editorial noted that research into the effect of running on those with osteoarthritis was still in its infancy. “This would help to guide clinical practice on how to support people with osteoarthritis, with regard to accessing the health benefits of running participation,” write Jean-Francois Esculier, PT, PhD, from the University of British Columbia, Vancouver, and Christian Barton, PhD, with the La Trobe Centre, pointing out there were a lack of evidence-based clinical recommendations for people with osteoarthritis who want to start or continue running.

It’s a question that PhD candidate Michaela Khan, MSc, is trying to answer at the University of British Columbia. “Our lab did a pilot study for my current study now, and they found that osteoarthritic cartilage took a little bit longer to recover than their healthy counterparts,” Ms. Khan said. Her research is suggesting that people with osteoarthritis not only can run, but even those with severe disease, who might be candidates for knee replacement, can run long distances.

Commenting on the analysis, Ms. Khan said the main take-home message was that healthy cartilage seems to recover after running, and that there is not an ongoing effect of ‘wear and tear.’

“That’s changing the narrative that if you keep running, it will wear away your cartilage, it’ll hurt your knees,” she said. “Now, we have a good synthesis of scientific evidence to prove maybe otherwise.”

Ms. Coburn and Dr. Culvenor report grant support from the National Health & Medical Research Council of Australia, and another author reports grant support from the U.S. National Institute of Arthritis and Musculoskeletal and Skin Diseases. The authors, as well as Dr. Lo and Ms. Khan, report relevant financial relationships.
 

High levels of high-density lipoprotein cholesterol (HDL-C) in older adults are associated with a higher risk of sustaining a fracture than lower HDL-C levels, a new study suggests.

Raycat/Getty Images

“Two animal studies showing that HDL-C reduces bone mineral density by reducing osteoblast number and function provide a plausible explanation for why high HDL-C may increase the risk of fractures,” Monira Hussain, MBBS, MPH, PhD, of Monash University in Melbourne, told this news organization. “So, it was not surprising when our analyses provided evidence that amongst those in the highest quintile of HDL-C (> 74 mg/dL), there was a [33%] increased risk of fractures.”

After adjustment, one standard deviation increment in HDL-C level was associated with a 14% higher risk of fracture during a 4-year follow-up.

Based on this and other studies, Dr. Hussain said, “I believe that the finding of a very high HDL-C [should] alert clinicians to a higher risk of mortality, fractures, and possibly other threats to their patient’s health.”

The study was published online in JAMA Cardiology.
 

Independent risk factor

For this report, the researchers conducted a post hoc analysis of data from the Aspirin in Reducing Events in the Elderly (ASPREE) clinical trial and the ASPREE-Fracture substudy.

ASPREE was a double-blind, randomized, placebo-controlled primary prevention trial of aspirin. Participants were 16,703 community-dwelling Australians and 2,411 individuals from the United States with a mean age of 75 and without evident cardiovascular disease, dementia, physical disability, or life-limiting chronic illness.

The ASPREE-Fracture substudy collected data on fractures reported post randomization from the Australian participants. Fractures were confirmed by imaging and adjudicated by an expert panel and included both traumatic and minimal trauma fractures.

Of the 16,262 participants who had a plasma HDL-C measurement at baseline (55% women), 1,659 (10.2%) experienced at least one fracture over a median of 4 years. This included 711 minimal trauma fractures (for example, falls from standing height) and 948 other trauma fractures, mainly falls on stairs, ladders, or stools.

Higher rates of fractures occurred in the highest quintile of HDL-C level where the mean level was 89 mg/dL. At baseline, participants in that quintile had a lower BMI, a high prevalence of current/former smoking and current alcohol use, 12 years or longer of school, more physical activity, and higher use of antiosteoporosis medication. They also had less chronic kidney disease, diabetes, prefrailty/frailty, or treatment with lipid-lowering drugs.

In a fully adjusted model, each standard deviation increment in HDL-C level was associated with a 14% higher risk of fractures (hazard ratio, 1.14). When analyzed in quintiles, compared with participants in Q1, those in Q5 had a 33% higher risk for fracture (HR, 1.33).

Prevalence rates were similar between the sexes. The increase in fracture risk appeared to be independent of traditional risk factors for fractures, including age, sex, physical activity, alcohol use, frailty, BMI, smoking status, diabetes, chronic kidney disease, use of lipid-lowering or antiosteoporosis drugs, and education, the authors note.

The results persisted in sensitivity analyses in restricted subgroups of interest and in stratified analyses – including, for example, only minimal fractures; participants not taking antiosteoporosis drugs or statins; never smokers; nondrinkers; and those engaging in minimal physical activity (walking less than 30 minutes per day).

No association was observed between non–HDL-C levels and fractures.

The authors conclude that the study “provides robust evidence that higher levels of HDL-C are associated with incident fractures in both male and female individuals, independent of conventional risk factors.”
 

Clinically useful?

Commenting on the study for this news organization, Marilyn Tan, MD, clinic chief of the Endocrine Clinic and clinical associate professor of medicine at Stanford (Calif.) University, said, “I certainly would not recommend anyone do anything to actively lower their HDL levels. HDL levels are largely determined by genetics, diet, and lifestyle, with some effects from certain medications/supplements. Studies have demonstrated that moderately higher HDL levels may be protective for atherosclerosis.”

In the current study, she said, “Causation has not been proven, and importantly there is no evidence that reducing HDL levels reduces fracture risk. Also, this association between raised HDL levels and fracture risk has not been demonstrated consistently in other studies.”

Furthermore, she noted, the preclinical trials on which the authors based their hypothesis – that is, an association between HDL and a reduction in the number and function of osteoblasts – “has not been demonstrated widely in human subjects.”

“We have a large armamentarium of FDA-approved treatments for osteoporosis that have been clinically proven to reduce fracture risk very significantly, and these are the tools [in addition to lifestyle changes] we should use to reduce fracture risk,” Dr. Tan concluded.

John Wilkins, MD, of Northwestern University, Chicago, and Anand Rohatgi, MD, MSCS, of UT Southwestern Medical Center, Dallas, also point out some limitations of the study in a related editorial.

They note the inclusion of predominantly healthy adults with a mean age of 75, a population that could yield different findings from middle-aged cohorts with chronic illnesses, as well as a lack of clarity regarding the possible role of alcohol intake among the study participants.

Furthermore, the editorialists write, although significant associations were shown in this study, “models were not adjusted for detailed measures of exercise/activity, triglycerides, or any other lipids, including other HDL compositional measures such as HDL-P or ApoA-I levels. There was no assessment of whether HDL-C improved discrimination, reclassification, or any other validated measures of risk prediction performance.

“Taken together,” they conclude, “this study alone leaves several unanswered questions as to whether high HDL-C could be a useful biomarker to detect fracture risk.”

No commercial funding was disclosed. The authors report no relevant financial relationships.

A version of this article originally appeared on Medscape.com.

High levels of high-density lipoprotein cholesterol (HDL-C) in older adults are associated with a higher risk of sustaining a fracture than lower HDL-C levels, a new study suggests.

Raycat/Getty Images

“Two animal studies showing that HDL-C reduces bone mineral density by reducing osteoblast number and function provide a plausible explanation for why high HDL-C may increase the risk of fractures,” Monira Hussain, MBBS, MPH, PhD, of Monash University in Melbourne, told this news organization. “So, it was not surprising when our analyses provided evidence that amongst those in the highest quintile of HDL-C (> 74 mg/dL), there was a [33%] increased risk of fractures.”

After adjustment, one standard deviation increment in HDL-C level was associated with a 14% higher risk of fracture during a 4-year follow-up.

Based on this and other studies, Dr. Hussain said, “I believe that the finding of a very high HDL-C [should] alert clinicians to a higher risk of mortality, fractures, and possibly other threats to their patient’s health.”

The study was published online in JAMA Cardiology.
 

Independent risk factor

For this report, the researchers conducted a post hoc analysis of data from the Aspirin in Reducing Events in the Elderly (ASPREE) clinical trial and the ASPREE-Fracture substudy.

ASPREE was a double-blind, randomized, placebo-controlled primary prevention trial of aspirin. Participants were 16,703 community-dwelling Australians and 2,411 individuals from the United States with a mean age of 75 and without evident cardiovascular disease, dementia, physical disability, or life-limiting chronic illness.

The ASPREE-Fracture substudy collected data on fractures reported post randomization from the Australian participants. Fractures were confirmed by imaging and adjudicated by an expert panel and included both traumatic and minimal trauma fractures.

Of the 16,262 participants who had a plasma HDL-C measurement at baseline (55% women), 1,659 (10.2%) experienced at least one fracture over a median of 4 years. This included 711 minimal trauma fractures (for example, falls from standing height) and 948 other trauma fractures, mainly falls on stairs, ladders, or stools.

Higher rates of fractures occurred in the highest quintile of HDL-C level where the mean level was 89 mg/dL. At baseline, participants in that quintile had a lower BMI, a high prevalence of current/former smoking and current alcohol use, 12 years or longer of school, more physical activity, and higher use of antiosteoporosis medication. They also had less chronic kidney disease, diabetes, prefrailty/frailty, or treatment with lipid-lowering drugs.

In a fully adjusted model, each standard deviation increment in HDL-C level was associated with a 14% higher risk of fractures (hazard ratio, 1.14). When analyzed in quintiles, compared with participants in Q1, those in Q5 had a 33% higher risk for fracture (HR, 1.33).

Prevalence rates were similar between the sexes. The increase in fracture risk appeared to be independent of traditional risk factors for fractures, including age, sex, physical activity, alcohol use, frailty, BMI, smoking status, diabetes, chronic kidney disease, use of lipid-lowering or antiosteoporosis drugs, and education, the authors note.

The results persisted in sensitivity analyses in restricted subgroups of interest and in stratified analyses – including, for example, only minimal fractures; participants not taking antiosteoporosis drugs or statins; never smokers; nondrinkers; and those engaging in minimal physical activity (walking less than 30 minutes per day).

No association was observed between non–HDL-C levels and fractures.

The authors conclude that the study “provides robust evidence that higher levels of HDL-C are associated with incident fractures in both male and female individuals, independent of conventional risk factors.”
 

Clinically useful?

Commenting on the study for this news organization, Marilyn Tan, MD, clinic chief of the Endocrine Clinic and clinical associate professor of medicine at Stanford (Calif.) University, said, “I certainly would not recommend anyone do anything to actively lower their HDL levels. HDL levels are largely determined by genetics, diet, and lifestyle, with some effects from certain medications/supplements. Studies have demonstrated that moderately higher HDL levels may be protective for atherosclerosis.”

In the current study, she said, “Causation has not been proven, and importantly there is no evidence that reducing HDL levels reduces fracture risk. Also, this association between raised HDL levels and fracture risk has not been demonstrated consistently in other studies.”

Furthermore, she noted, the preclinical trials on which the authors based their hypothesis – that is, an association between HDL and a reduction in the number and function of osteoblasts – “has not been demonstrated widely in human subjects.”

“We have a large armamentarium of FDA-approved treatments for osteoporosis that have been clinically proven to reduce fracture risk very significantly, and these are the tools [in addition to lifestyle changes] we should use to reduce fracture risk,” Dr. Tan concluded.

John Wilkins, MD, of Northwestern University, Chicago, and Anand Rohatgi, MD, MSCS, of UT Southwestern Medical Center, Dallas, also point out some limitations of the study in a related editorial.

They note the inclusion of predominantly healthy adults with a mean age of 75, a population that could yield different findings from middle-aged cohorts with chronic illnesses, as well as a lack of clarity regarding the possible role of alcohol intake among the study participants.

Furthermore, the editorialists write, although significant associations were shown in this study, “models were not adjusted for detailed measures of exercise/activity, triglycerides, or any other lipids, including other HDL compositional measures such as HDL-P or ApoA-I levels. There was no assessment of whether HDL-C improved discrimination, reclassification, or any other validated measures of risk prediction performance.

“Taken together,” they conclude, “this study alone leaves several unanswered questions as to whether high HDL-C could be a useful biomarker to detect fracture risk.”

No commercial funding was disclosed. The authors report no relevant financial relationships.

A version of this article originally appeared on Medscape.com.

High levels of high-density lipoprotein cholesterol (HDL-C) in older adults are associated with a higher risk of sustaining a fracture than lower HDL-C levels, a new study suggests.

Raycat/Getty Images

“Two animal studies showing that HDL-C reduces bone mineral density by reducing osteoblast number and function provide a plausible explanation for why high HDL-C may increase the risk of fractures,” Monira Hussain, MBBS, MPH, PhD, of Monash University in Melbourne, told this news organization. “So, it was not surprising when our analyses provided evidence that amongst those in the highest quintile of HDL-C (> 74 mg/dL), there was a [33%] increased risk of fractures.”

After adjustment, one standard deviation increment in HDL-C level was associated with a 14% higher risk of fracture during a 4-year follow-up.

Based on this and other studies, Dr. Hussain said, “I believe that the finding of a very high HDL-C [should] alert clinicians to a higher risk of mortality, fractures, and possibly other threats to their patient’s health.”

The study was published online in JAMA Cardiology.
 

Independent risk factor

For this report, the researchers conducted a post hoc analysis of data from the Aspirin in Reducing Events in the Elderly (ASPREE) clinical trial and the ASPREE-Fracture substudy.

ASPREE was a double-blind, randomized, placebo-controlled primary prevention trial of aspirin. Participants were 16,703 community-dwelling Australians and 2,411 individuals from the United States with a mean age of 75 and without evident cardiovascular disease, dementia, physical disability, or life-limiting chronic illness.

The ASPREE-Fracture substudy collected data on fractures reported post randomization from the Australian participants. Fractures were confirmed by imaging and adjudicated by an expert panel and included both traumatic and minimal trauma fractures.

Of the 16,262 participants who had a plasma HDL-C measurement at baseline (55% women), 1,659 (10.2%) experienced at least one fracture over a median of 4 years. This included 711 minimal trauma fractures (for example, falls from standing height) and 948 other trauma fractures, mainly falls on stairs, ladders, or stools.

Higher rates of fractures occurred in the highest quintile of HDL-C level where the mean level was 89 mg/dL. At baseline, participants in that quintile had a lower BMI, a high prevalence of current/former smoking and current alcohol use, 12 years or longer of school, more physical activity, and higher use of antiosteoporosis medication. They also had less chronic kidney disease, diabetes, prefrailty/frailty, or treatment with lipid-lowering drugs.

In a fully adjusted model, each standard deviation increment in HDL-C level was associated with a 14% higher risk of fractures (hazard ratio, 1.14). When analyzed in quintiles, compared with participants in Q1, those in Q5 had a 33% higher risk for fracture (HR, 1.33).

Prevalence rates were similar between the sexes. The increase in fracture risk appeared to be independent of traditional risk factors for fractures, including age, sex, physical activity, alcohol use, frailty, BMI, smoking status, diabetes, chronic kidney disease, use of lipid-lowering or antiosteoporosis drugs, and education, the authors note.

The results persisted in sensitivity analyses in restricted subgroups of interest and in stratified analyses – including, for example, only minimal fractures; participants not taking antiosteoporosis drugs or statins; never smokers; nondrinkers; and those engaging in minimal physical activity (walking less than 30 minutes per day).

No association was observed between non–HDL-C levels and fractures.

The authors conclude that the study “provides robust evidence that higher levels of HDL-C are associated with incident fractures in both male and female individuals, independent of conventional risk factors.”
 

Clinically useful?

Commenting on the study for this news organization, Marilyn Tan, MD, clinic chief of the Endocrine Clinic and clinical associate professor of medicine at Stanford (Calif.) University, said, “I certainly would not recommend anyone do anything to actively lower their HDL levels. HDL levels are largely determined by genetics, diet, and lifestyle, with some effects from certain medications/supplements. Studies have demonstrated that moderately higher HDL levels may be protective for atherosclerosis.”

In the current study, she said, “Causation has not been proven, and importantly there is no evidence that reducing HDL levels reduces fracture risk. Also, this association between raised HDL levels and fracture risk has not been demonstrated consistently in other studies.”

Furthermore, she noted, the preclinical trials on which the authors based their hypothesis – that is, an association between HDL and a reduction in the number and function of osteoblasts – “has not been demonstrated widely in human subjects.”

“We have a large armamentarium of FDA-approved treatments for osteoporosis that have been clinically proven to reduce fracture risk very significantly, and these are the tools [in addition to lifestyle changes] we should use to reduce fracture risk,” Dr. Tan concluded.

John Wilkins, MD, of Northwestern University, Chicago, and Anand Rohatgi, MD, MSCS, of UT Southwestern Medical Center, Dallas, also point out some limitations of the study in a related editorial.

They note the inclusion of predominantly healthy adults with a mean age of 75, a population that could yield different findings from middle-aged cohorts with chronic illnesses, as well as a lack of clarity regarding the possible role of alcohol intake among the study participants.

Furthermore, the editorialists write, although significant associations were shown in this study, “models were not adjusted for detailed measures of exercise/activity, triglycerides, or any other lipids, including other HDL compositional measures such as HDL-P or ApoA-I levels. There was no assessment of whether HDL-C improved discrimination, reclassification, or any other validated measures of risk prediction performance.

“Taken together,” they conclude, “this study alone leaves several unanswered questions as to whether high HDL-C could be a useful biomarker to detect fracture risk.”

No commercial funding was disclosed. The authors report no relevant financial relationships.

A version of this article originally appeared on Medscape.com.

Exercise helps patients with knee osteoarthritis, but more isn’t necessarily better, new research shows.

A low-dose exercise regimen helped patients with knee OA about as much as a more intense workout plan, according to trial results published online in Annals of Internal Medicine.

kali9/Getty Images

Both high and low doses of exercise reduced pain and improved function and quality of life.

The improvements with the lower-dose plan and its 98% adherence rate are encouraging, said Nick Trasolini, MD, assistant professor of orthopedic surgery at Atrium Health Wake Forest Baptist Medical Center, Winston-Salem, N.C.

“This is a very doable amount of medical exercise therapy for patients with knee osteoarthritis, and one that makes a big difference in patient-reported symptoms,” Dr. Trasolini, who was not involved in the study, said in an interview.
 

What’s the right dose?

Exercise is a go-to treatment for knee OA, but the precise dose to recommend has been unclear. To study this question, Tom Arild Torstensen, MSc, RPT, with Karolinska Institutet, Huddinge, Sweden, and Holten Institute, Stockholm, and colleagues conducted a trial at four centers in Sweden and Norway.

The study included 189 men and women with knee OA. Participants were randomly assigned to low- or high-dose exercise plans, which they performed three times per week for 12 weeks under the supervision of a physiotherapist.

Participants in the high-dose group performed 11 exercises during each session, which lasted 70-90 minutes.

The low-dose regimen consisted of five exercises – cycling, squats, step-ups, step-downs, and knee extensions – performed for 20–30 minutes.

The researchers measured outcomes using the Knee Injury and Osteoarthritis Outcome Score, which assesses pain, other symptoms, function in daily living, function in sports and recreation, and knee-related quality of life.

“Patients in both groups improved significantly over time, but high-dose exercise was not superior to low-dose exercise in most comparisons,” the study investigators reported

High-dose exercise was associated with better function in sports and recreational activity and knee-related quality of life at 6 months. Those differences did not persist at 1 year, however. The researchers reported no safety concerns with either intervention.

Adherence was “nearly perfect” in the low-dose group. It was slightly lower in the high-dose group, the researchers said.

“Interestingly, it seems that high-dose treatment could be preferable to low-dose treatment in the long run for people who lead active lives,” they wrote. “This should be the subject of future studies.”

All clinical practice guidelines for knee OA recommend exercise, but “we do not know the optimal dose,” Kim Bennell, PhD, a research physiotherapist at the University of Melbourne, said in an interview.

Dose has components, including number of times per week, number of exercises, sets and repetitions, intensity, and duration of exercise sessions, Dr. Bennell said.

“These results suggest that an exercise program that involves less time and fewer exercises can still offer benefits and may be easier for patients to undertake and stick at than one that involves greater time and effort,” she said.

The study was supported by the Swedish Rheumatic Fund. Dr. Trasolini and Dr. Bennell have disclosed no relevant financial relationships.

A version of this article originally appeared on Medscape.com.

Exercise helps patients with knee osteoarthritis, but more isn’t necessarily better, new research shows.

A low-dose exercise regimen helped patients with knee OA about as much as a more intense workout plan, according to trial results published online in Annals of Internal Medicine.

kali9/Getty Images

Both high and low doses of exercise reduced pain and improved function and quality of life.

The improvements with the lower-dose plan and its 98% adherence rate are encouraging, said Nick Trasolini, MD, assistant professor of orthopedic surgery at Atrium Health Wake Forest Baptist Medical Center, Winston-Salem, N.C.

“This is a very doable amount of medical exercise therapy for patients with knee osteoarthritis, and one that makes a big difference in patient-reported symptoms,” Dr. Trasolini, who was not involved in the study, said in an interview.
 

What’s the right dose?

Exercise is a go-to treatment for knee OA, but the precise dose to recommend has been unclear. To study this question, Tom Arild Torstensen, MSc, RPT, with Karolinska Institutet, Huddinge, Sweden, and Holten Institute, Stockholm, and colleagues conducted a trial at four centers in Sweden and Norway.

The study included 189 men and women with knee OA. Participants were randomly assigned to low- or high-dose exercise plans, which they performed three times per week for 12 weeks under the supervision of a physiotherapist.

Participants in the high-dose group performed 11 exercises during each session, which lasted 70-90 minutes.

The low-dose regimen consisted of five exercises – cycling, squats, step-ups, step-downs, and knee extensions – performed for 20–30 minutes.

The researchers measured outcomes using the Knee Injury and Osteoarthritis Outcome Score, which assesses pain, other symptoms, function in daily living, function in sports and recreation, and knee-related quality of life.

“Patients in both groups improved significantly over time, but high-dose exercise was not superior to low-dose exercise in most comparisons,” the study investigators reported

High-dose exercise was associated with better function in sports and recreational activity and knee-related quality of life at 6 months. Those differences did not persist at 1 year, however. The researchers reported no safety concerns with either intervention.

Adherence was “nearly perfect” in the low-dose group. It was slightly lower in the high-dose group, the researchers said.

“Interestingly, it seems that high-dose treatment could be preferable to low-dose treatment in the long run for people who lead active lives,” they wrote. “This should be the subject of future studies.”

All clinical practice guidelines for knee OA recommend exercise, but “we do not know the optimal dose,” Kim Bennell, PhD, a research physiotherapist at the University of Melbourne, said in an interview.

Dose has components, including number of times per week, number of exercises, sets and repetitions, intensity, and duration of exercise sessions, Dr. Bennell said.

“These results suggest that an exercise program that involves less time and fewer exercises can still offer benefits and may be easier for patients to undertake and stick at than one that involves greater time and effort,” she said.

The study was supported by the Swedish Rheumatic Fund. Dr. Trasolini and Dr. Bennell have disclosed no relevant financial relationships.

A version of this article originally appeared on Medscape.com.

Exercise helps patients with knee osteoarthritis, but more isn’t necessarily better, new research shows.

A low-dose exercise regimen helped patients with knee OA about as much as a more intense workout plan, according to trial results published online in Annals of Internal Medicine.

kali9/Getty Images

Both high and low doses of exercise reduced pain and improved function and quality of life.

The improvements with the lower-dose plan and its 98% adherence rate are encouraging, said Nick Trasolini, MD, assistant professor of orthopedic surgery at Atrium Health Wake Forest Baptist Medical Center, Winston-Salem, N.C.

“This is a very doable amount of medical exercise therapy for patients with knee osteoarthritis, and one that makes a big difference in patient-reported symptoms,” Dr. Trasolini, who was not involved in the study, said in an interview.
 

What’s the right dose?

Exercise is a go-to treatment for knee OA, but the precise dose to recommend has been unclear. To study this question, Tom Arild Torstensen, MSc, RPT, with Karolinska Institutet, Huddinge, Sweden, and Holten Institute, Stockholm, and colleagues conducted a trial at four centers in Sweden and Norway.

The study included 189 men and women with knee OA. Participants were randomly assigned to low- or high-dose exercise plans, which they performed three times per week for 12 weeks under the supervision of a physiotherapist.

Participants in the high-dose group performed 11 exercises during each session, which lasted 70-90 minutes.

The low-dose regimen consisted of five exercises – cycling, squats, step-ups, step-downs, and knee extensions – performed for 20–30 minutes.

The researchers measured outcomes using the Knee Injury and Osteoarthritis Outcome Score, which assesses pain, other symptoms, function in daily living, function in sports and recreation, and knee-related quality of life.

“Patients in both groups improved significantly over time, but high-dose exercise was not superior to low-dose exercise in most comparisons,” the study investigators reported

High-dose exercise was associated with better function in sports and recreational activity and knee-related quality of life at 6 months. Those differences did not persist at 1 year, however. The researchers reported no safety concerns with either intervention.

Adherence was “nearly perfect” in the low-dose group. It was slightly lower in the high-dose group, the researchers said.

“Interestingly, it seems that high-dose treatment could be preferable to low-dose treatment in the long run for people who lead active lives,” they wrote. “This should be the subject of future studies.”

All clinical practice guidelines for knee OA recommend exercise, but “we do not know the optimal dose,” Kim Bennell, PhD, a research physiotherapist at the University of Melbourne, said in an interview.

Dose has components, including number of times per week, number of exercises, sets and repetitions, intensity, and duration of exercise sessions, Dr. Bennell said.

“These results suggest that an exercise program that involves less time and fewer exercises can still offer benefits and may be easier for patients to undertake and stick at than one that involves greater time and effort,” she said.

The study was supported by the Swedish Rheumatic Fund. Dr. Trasolini and Dr. Bennell have disclosed no relevant financial relationships.

A version of this article originally appeared on Medscape.com.