VIDEO: Postoperative cognitive decline hits women hardest

WASHINGTON – Postoperative cognitive decline, which occurs in roughly 20% of elderly patients who undergo major surgery, strikes older women with greater severity than it does similarly aged men, according to a retrospective analysis of data collected from 527 older Americans.

“We looked at the sex difference in postoperative cognitive decline and Alzheimer’s disease because of the sex difference in Alzheimer’s disease, where about two-thirds of patients are women,” Dr. Katie J. Schenning said in an interview during the Alzheimer’s Association International Conference 2015. “We know that a lot of the pathologic changes that happen to the brain after anesthesia and surgery are similar to the changes that happen in Alzheimer’s disease patients. But at this point that is all we can say about a link between the two. It is currently unknown whether there is a clear relationship between postoperative cognitive decline and Alzheimer’s disease,” said Dr. Schenning, an anesthesiologist at Oregon Health & Science University in Portland.

She and her associates studied data collected longitudinally from two cohorts, the Oregon Brain Aging Study and the Intelligent Systems for Assessment of Aging Changes. At baseline, the average age of the enrollees in the combined group was 83 years, and just under two-thirds were women. During follow-up, 182 of the participants underwent a total of 331 major surgeries, with some undergoing more than one surgery. The most common form of surgery was orthopedic, done in one-third of the patients, followed by general surgery, in a quarter.

The researchers running both studies collected data annually from participants using a battery of neuropsychological evaluations, brain MRIs, and information on their general health. Retrospective analysis of the data showed that following surgery, people showed evidence of statistically significant and clinically meaningful declines in several measures, compared with those who did not undergo surgery, including deficits measured by the Mini-Mental State Examination, instrumental activities of daily living, and logical memory delayed recall. The trajectory of these declines was significantly steeper in women following surgery, compared with men following surgery, Dr. Schenning reported in a poster at the meeting. In addition, the MRI scans showed ventricular enlargement in the postsurgical women but not in men, a change that is characteristic of neuropathology.

“Women who underwent surgery had a more rapid rate of decline in measures of cognition and function than women who did not have surgery, and it affected women in more categories than in men,” Dr. Schenning said.

The risk for postoperative cognitive decline “is one of the things that patients should take into consideration before undergoing elective surgery, especially if they are older or have pre-existing cognitive impairment,” Dr. Schenning suggested. The enhanced risk for postsurgical cognitive decline faced by older women and even the somewhat lesser risk that exists for older men “is certainly something that patients should discuss with their surgeon, anesthesiologist, and family members,” she said.

Dr. Schenning had no disclosures.

[email protected]

On Twitter @mitchelzoler

WASHINGTON – Postoperative cognitive decline, which occurs in roughly 20% of elderly patients who undergo major surgery, strikes older women with greater severity than it does similarly aged men, according to a retrospective analysis of data collected from 527 older Americans.

“We looked at the sex difference in postoperative cognitive decline and Alzheimer’s disease because of the sex difference in Alzheimer’s disease, where about two-thirds of patients are women,” Dr. Katie J. Schenning said in an interview during the Alzheimer’s Association International Conference 2015. “We know that a lot of the pathologic changes that happen to the brain after anesthesia and surgery are similar to the changes that happen in Alzheimer’s disease patients. But at this point that is all we can say about a link between the two. It is currently unknown whether there is a clear relationship between postoperative cognitive decline and Alzheimer’s disease,” said Dr. Schenning, an anesthesiologist at Oregon Health & Science University in Portland.

She and her associates studied data collected longitudinally from two cohorts, the Oregon Brain Aging Study and the Intelligent Systems for Assessment of Aging Changes. At baseline, the average age of the enrollees in the combined group was 83 years, and just under two-thirds were women. During follow-up, 182 of the participants underwent a total of 331 major surgeries, with some undergoing more than one surgery. The most common form of surgery was orthopedic, done in one-third of the patients, followed by general surgery, in a quarter.

The researchers running both studies collected data annually from participants using a battery of neuropsychological evaluations, brain MRIs, and information on their general health. Retrospective analysis of the data showed that following surgery, people showed evidence of statistically significant and clinically meaningful declines in several measures, compared with those who did not undergo surgery, including deficits measured by the Mini-Mental State Examination, instrumental activities of daily living, and logical memory delayed recall. The trajectory of these declines was significantly steeper in women following surgery, compared with men following surgery, Dr. Schenning reported in a poster at the meeting. In addition, the MRI scans showed ventricular enlargement in the postsurgical women but not in men, a change that is characteristic of neuropathology.

“Women who underwent surgery had a more rapid rate of decline in measures of cognition and function than women who did not have surgery, and it affected women in more categories than in men,” Dr. Schenning said.

The risk for postoperative cognitive decline “is one of the things that patients should take into consideration before undergoing elective surgery, especially if they are older or have pre-existing cognitive impairment,” Dr. Schenning suggested. The enhanced risk for postsurgical cognitive decline faced by older women and even the somewhat lesser risk that exists for older men “is certainly something that patients should discuss with their surgeon, anesthesiologist, and family members,” she said.

Dr. Schenning had no disclosures.

[email protected]

On Twitter @mitchelzoler

WASHINGTON – Postoperative cognitive decline, which occurs in roughly 20% of elderly patients who undergo major surgery, strikes older women with greater severity than it does similarly aged men, according to a retrospective analysis of data collected from 527 older Americans.

“We looked at the sex difference in postoperative cognitive decline and Alzheimer’s disease because of the sex difference in Alzheimer’s disease, where about two-thirds of patients are women,” Dr. Katie J. Schenning said in an interview during the Alzheimer’s Association International Conference 2015. “We know that a lot of the pathologic changes that happen to the brain after anesthesia and surgery are similar to the changes that happen in Alzheimer’s disease patients. But at this point that is all we can say about a link between the two. It is currently unknown whether there is a clear relationship between postoperative cognitive decline and Alzheimer’s disease,” said Dr. Schenning, an anesthesiologist at Oregon Health & Science University in Portland.

She and her associates studied data collected longitudinally from two cohorts, the Oregon Brain Aging Study and the Intelligent Systems for Assessment of Aging Changes. At baseline, the average age of the enrollees in the combined group was 83 years, and just under two-thirds were women. During follow-up, 182 of the participants underwent a total of 331 major surgeries, with some undergoing more than one surgery. The most common form of surgery was orthopedic, done in one-third of the patients, followed by general surgery, in a quarter.

The researchers running both studies collected data annually from participants using a battery of neuropsychological evaluations, brain MRIs, and information on their general health. Retrospective analysis of the data showed that following surgery, people showed evidence of statistically significant and clinically meaningful declines in several measures, compared with those who did not undergo surgery, including deficits measured by the Mini-Mental State Examination, instrumental activities of daily living, and logical memory delayed recall. The trajectory of these declines was significantly steeper in women following surgery, compared with men following surgery, Dr. Schenning reported in a poster at the meeting. In addition, the MRI scans showed ventricular enlargement in the postsurgical women but not in men, a change that is characteristic of neuropathology.

“Women who underwent surgery had a more rapid rate of decline in measures of cognition and function than women who did not have surgery, and it affected women in more categories than in men,” Dr. Schenning said.

The risk for postoperative cognitive decline “is one of the things that patients should take into consideration before undergoing elective surgery, especially if they are older or have pre-existing cognitive impairment,” Dr. Schenning suggested. The enhanced risk for postsurgical cognitive decline faced by older women and even the somewhat lesser risk that exists for older men “is certainly something that patients should discuss with their surgeon, anesthesiologist, and family members,” she said.

Dr. Schenning had no disclosures.

[email protected]

On Twitter @mitchelzoler