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Testing for Associations Between an Environmental Risk Score and Most Significant Colonoscopy Findings Among US Veterans in CSP #380
PURPOSE
To construct a composite score representing modifiable lifestyle and environmental risk (e-score) and test for associations with colonoscopy findings among US Veteran participants of CSP #380.
BACKGROUND
Understanding environmental and genetic risks beyond self-reported family history is a way to develop personalized colorectal cancer (CRC) screening. The Genetics and Epidemiology of Colorectal Cancer Consortium (GECCO) study examined CRC risk stratified by sex and included an e-score along with genetic risk scores, where higher scores indicated higher risk. Both e-scores and genetic risk scores were significantly associated with CRC risk and models that included these were more robust than models that only included family history.
METHODS
CSP #380 is a prospective study of outcomes during colonoscopy screening (1994-97) and follow- up (1994-2009) for 3,121 asymptomatic Veterans aged 50-75. The dichotomous outcome of interest was most significant colonoscopy findings (MSCF) of i) advanced neoplasia (AN: ≥10mm adenomas or advanced histology, or invasive CRC) vs. ii) non-advanced adenomas (<10mm with tubular histology) or no neoplasia. The independent variable, e-score, was weighted according to the GECCO male sample and comprised BMI, height, diabetes, NSAID use, education, alcohol intake, smoking, exercise, and diet.
DATA ANALYSIS
Logistic regression was used to test associations between MSCF and e-scores, controlling for age, family history and number of colonoscopies.
RESULTS
Among 2,846 participants with complete data, 33.3% were aged 50-59 at baseline, 97% were male, and 83.8% were White. Those with AN (n=405, 14.2%) compared to those without AN (n=2,441, 85.8%) had higher median e-scores (29.5, range:0-99.8 vs. 29.0, range:5.2-100), suggesting a difference. The logistic regression models showed older participants (aOR: 1.04, 95% CI: 1.03-1.06) and those with more colonoscopies (aOR: 1.19, 95% CI: 1.06-1.33) had higher odds for AN. However, e-scores and family history were not significantly associated with MCSF.
IMPLICATIONS
E-scores were not significantly associated with MSCF in this preliminary study. Developing escores among a larger, diverse sample (N~381,695) of US veterans in the Million Veterans Program study will allow for stratified models in investigations of environmental and genetic risk for CRC. Outcomes from those analyses will support advances in screening guidelines with tailored programs for long-term CRC prevention.
PURPOSE
To construct a composite score representing modifiable lifestyle and environmental risk (e-score) and test for associations with colonoscopy findings among US Veteran participants of CSP #380.
BACKGROUND
Understanding environmental and genetic risks beyond self-reported family history is a way to develop personalized colorectal cancer (CRC) screening. The Genetics and Epidemiology of Colorectal Cancer Consortium (GECCO) study examined CRC risk stratified by sex and included an e-score along with genetic risk scores, where higher scores indicated higher risk. Both e-scores and genetic risk scores were significantly associated with CRC risk and models that included these were more robust than models that only included family history.
METHODS
CSP #380 is a prospective study of outcomes during colonoscopy screening (1994-97) and follow- up (1994-2009) for 3,121 asymptomatic Veterans aged 50-75. The dichotomous outcome of interest was most significant colonoscopy findings (MSCF) of i) advanced neoplasia (AN: ≥10mm adenomas or advanced histology, or invasive CRC) vs. ii) non-advanced adenomas (<10mm with tubular histology) or no neoplasia. The independent variable, e-score, was weighted according to the GECCO male sample and comprised BMI, height, diabetes, NSAID use, education, alcohol intake, smoking, exercise, and diet.
DATA ANALYSIS
Logistic regression was used to test associations between MSCF and e-scores, controlling for age, family history and number of colonoscopies.
RESULTS
Among 2,846 participants with complete data, 33.3% were aged 50-59 at baseline, 97% were male, and 83.8% were White. Those with AN (n=405, 14.2%) compared to those without AN (n=2,441, 85.8%) had higher median e-scores (29.5, range:0-99.8 vs. 29.0, range:5.2-100), suggesting a difference. The logistic regression models showed older participants (aOR: 1.04, 95% CI: 1.03-1.06) and those with more colonoscopies (aOR: 1.19, 95% CI: 1.06-1.33) had higher odds for AN. However, e-scores and family history were not significantly associated with MCSF.
IMPLICATIONS
E-scores were not significantly associated with MSCF in this preliminary study. Developing escores among a larger, diverse sample (N~381,695) of US veterans in the Million Veterans Program study will allow for stratified models in investigations of environmental and genetic risk for CRC. Outcomes from those analyses will support advances in screening guidelines with tailored programs for long-term CRC prevention.
PURPOSE
To construct a composite score representing modifiable lifestyle and environmental risk (e-score) and test for associations with colonoscopy findings among US Veteran participants of CSP #380.
BACKGROUND
Understanding environmental and genetic risks beyond self-reported family history is a way to develop personalized colorectal cancer (CRC) screening. The Genetics and Epidemiology of Colorectal Cancer Consortium (GECCO) study examined CRC risk stratified by sex and included an e-score along with genetic risk scores, where higher scores indicated higher risk. Both e-scores and genetic risk scores were significantly associated with CRC risk and models that included these were more robust than models that only included family history.
METHODS
CSP #380 is a prospective study of outcomes during colonoscopy screening (1994-97) and follow- up (1994-2009) for 3,121 asymptomatic Veterans aged 50-75. The dichotomous outcome of interest was most significant colonoscopy findings (MSCF) of i) advanced neoplasia (AN: ≥10mm adenomas or advanced histology, or invasive CRC) vs. ii) non-advanced adenomas (<10mm with tubular histology) or no neoplasia. The independent variable, e-score, was weighted according to the GECCO male sample and comprised BMI, height, diabetes, NSAID use, education, alcohol intake, smoking, exercise, and diet.
DATA ANALYSIS
Logistic regression was used to test associations between MSCF and e-scores, controlling for age, family history and number of colonoscopies.
RESULTS
Among 2,846 participants with complete data, 33.3% were aged 50-59 at baseline, 97% were male, and 83.8% were White. Those with AN (n=405, 14.2%) compared to those without AN (n=2,441, 85.8%) had higher median e-scores (29.5, range:0-99.8 vs. 29.0, range:5.2-100), suggesting a difference. The logistic regression models showed older participants (aOR: 1.04, 95% CI: 1.03-1.06) and those with more colonoscopies (aOR: 1.19, 95% CI: 1.06-1.33) had higher odds for AN. However, e-scores and family history were not significantly associated with MCSF.
IMPLICATIONS
E-scores were not significantly associated with MSCF in this preliminary study. Developing escores among a larger, diverse sample (N~381,695) of US veterans in the Million Veterans Program study will allow for stratified models in investigations of environmental and genetic risk for CRC. Outcomes from those analyses will support advances in screening guidelines with tailored programs for long-term CRC prevention.
Associations Between Colorectal Cancer Progression and Dietary Patterns of US Veterans in CSP #380
PURPOSE
To analyze associations between colorectal cancer progression and diet scores calculated using published scoring approaches for three dietary patterns: Healthy Eating Index (HEI), Mediterranean Diet (Mediterranean), and Dietary Approaches to Stop Hypertension Diet (DASH).
BACKGROUND
Little is known about whether longterm risk for progression to colorectal cancer is associated with recommended healthy dietary patterns among US veterans. Previous studies of veterans have shown higher intake of fiber and vitamin D reduced risk, and red meat increased risk for finding colorectal cancer precursors during colonoscopy. However, studying dietary patterns in aggregate may be more clinically relevant for longitudinal studies of colorectal cancer prevention.
METHODS
3,121 asymptomatic US veterans aged 50-75 received colonoscopy between 1994-97 and were followed through 2009. Most significant colonoscopy findings (MSCF) across the study period were: (i) no neoplasia (NN), (ii) non-advanced adenomas (NAAs) or (iii) advanced neoplasia (AN). Baseline dietary questionnaire data were used to calculate three dietary pattern (HEI, Mediterranean, and DASH) scores.
DATA ANALYSIS
Multinomial logistic regression models were used in a cross-sectional analysis to test for associations represented by adjusted odds ratios (aOR) between MSCF and dietary pattern scores, controlling for demographics and clinical risk factors.
RESULTS
Among 3,023 participants with complete data, 97% were male, and 83.8% were White. Increasing scores, representing healthier diets, for each dietary pattern had similar or lower odds for NAAs and AN, respectively, versus NN. They were HEI: aOR: 1.00, 95% CI: 0.99-1.01 and aOR 0.97, 95% CI: 0.99-1.01; Mediterranean: aOR: 0.98, 95% CI: 0.95-1.02 and aOR 0.95, 95% CI: 0.90-0.999; DASH: aOR: 0.99, 95% CI: 0.99- 1.00 and aOR 0.99, 95% CI: 0.98-0.999. Across each dietary pattern, higher whole grain and fiber category scores generally had lower odds for NAAs and AN.
CONCLUSIONS
Study results revealed that overall higher dietary quality and specific dietary components of whole grain or fiber intake, based on three different dietary patterns suggest lower odds for CRC precursors. Findings indicate potential differences in dietary intake patterns and more research is needed to determine the benefit of developing tailored CRC screening and surveillance clinical guidelines.
PURPOSE
To analyze associations between colorectal cancer progression and diet scores calculated using published scoring approaches for three dietary patterns: Healthy Eating Index (HEI), Mediterranean Diet (Mediterranean), and Dietary Approaches to Stop Hypertension Diet (DASH).
BACKGROUND
Little is known about whether longterm risk for progression to colorectal cancer is associated with recommended healthy dietary patterns among US veterans. Previous studies of veterans have shown higher intake of fiber and vitamin D reduced risk, and red meat increased risk for finding colorectal cancer precursors during colonoscopy. However, studying dietary patterns in aggregate may be more clinically relevant for longitudinal studies of colorectal cancer prevention.
METHODS
3,121 asymptomatic US veterans aged 50-75 received colonoscopy between 1994-97 and were followed through 2009. Most significant colonoscopy findings (MSCF) across the study period were: (i) no neoplasia (NN), (ii) non-advanced adenomas (NAAs) or (iii) advanced neoplasia (AN). Baseline dietary questionnaire data were used to calculate three dietary pattern (HEI, Mediterranean, and DASH) scores.
DATA ANALYSIS
Multinomial logistic regression models were used in a cross-sectional analysis to test for associations represented by adjusted odds ratios (aOR) between MSCF and dietary pattern scores, controlling for demographics and clinical risk factors.
RESULTS
Among 3,023 participants with complete data, 97% were male, and 83.8% were White. Increasing scores, representing healthier diets, for each dietary pattern had similar or lower odds for NAAs and AN, respectively, versus NN. They were HEI: aOR: 1.00, 95% CI: 0.99-1.01 and aOR 0.97, 95% CI: 0.99-1.01; Mediterranean: aOR: 0.98, 95% CI: 0.95-1.02 and aOR 0.95, 95% CI: 0.90-0.999; DASH: aOR: 0.99, 95% CI: 0.99- 1.00 and aOR 0.99, 95% CI: 0.98-0.999. Across each dietary pattern, higher whole grain and fiber category scores generally had lower odds for NAAs and AN.
CONCLUSIONS
Study results revealed that overall higher dietary quality and specific dietary components of whole grain or fiber intake, based on three different dietary patterns suggest lower odds for CRC precursors. Findings indicate potential differences in dietary intake patterns and more research is needed to determine the benefit of developing tailored CRC screening and surveillance clinical guidelines.
PURPOSE
To analyze associations between colorectal cancer progression and diet scores calculated using published scoring approaches for three dietary patterns: Healthy Eating Index (HEI), Mediterranean Diet (Mediterranean), and Dietary Approaches to Stop Hypertension Diet (DASH).
BACKGROUND
Little is known about whether longterm risk for progression to colorectal cancer is associated with recommended healthy dietary patterns among US veterans. Previous studies of veterans have shown higher intake of fiber and vitamin D reduced risk, and red meat increased risk for finding colorectal cancer precursors during colonoscopy. However, studying dietary patterns in aggregate may be more clinically relevant for longitudinal studies of colorectal cancer prevention.
METHODS
3,121 asymptomatic US veterans aged 50-75 received colonoscopy between 1994-97 and were followed through 2009. Most significant colonoscopy findings (MSCF) across the study period were: (i) no neoplasia (NN), (ii) non-advanced adenomas (NAAs) or (iii) advanced neoplasia (AN). Baseline dietary questionnaire data were used to calculate three dietary pattern (HEI, Mediterranean, and DASH) scores.
DATA ANALYSIS
Multinomial logistic regression models were used in a cross-sectional analysis to test for associations represented by adjusted odds ratios (aOR) between MSCF and dietary pattern scores, controlling for demographics and clinical risk factors.
RESULTS
Among 3,023 participants with complete data, 97% were male, and 83.8% were White. Increasing scores, representing healthier diets, for each dietary pattern had similar or lower odds for NAAs and AN, respectively, versus NN. They were HEI: aOR: 1.00, 95% CI: 0.99-1.01 and aOR 0.97, 95% CI: 0.99-1.01; Mediterranean: aOR: 0.98, 95% CI: 0.95-1.02 and aOR 0.95, 95% CI: 0.90-0.999; DASH: aOR: 0.99, 95% CI: 0.99- 1.00 and aOR 0.99, 95% CI: 0.98-0.999. Across each dietary pattern, higher whole grain and fiber category scores generally had lower odds for NAAs and AN.
CONCLUSIONS
Study results revealed that overall higher dietary quality and specific dietary components of whole grain or fiber intake, based on three different dietary patterns suggest lower odds for CRC precursors. Findings indicate potential differences in dietary intake patterns and more research is needed to determine the benefit of developing tailored CRC screening and surveillance clinical guidelines.