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- Title
Questionnaire-Based Polyexposure Assessment Outperforms Polygenic Scores for Classification of Type 2 Diabetes in a Multiancestry Cohort.
- Authors
Akhtari, Farida S.; Lloyd, Dillon; Burkholder, Adam; Tong, Xiaoran; House, John S.; Lee, Eunice Y.; Buse, John; Schurman, Shepherd H.; Fargo, David C.; Schmitt, Charles P.; Hall, Janet; Motsinger-Reif, Alison A.
- Abstract
<bold>Objective: </bold>Environmental exposures may have greater predictive power for type 2 diabetes than polygenic scores (PGS). Studies examining environmental risk factors, however, have included only individuals with European ancestry, limiting the applicability of results. We conducted an exposome-wide association study in the multiancestry Personalized Environment and Genes Study to assess the effects of environmental factors on type 2 diabetes.<bold>Research Design and Methods: </bold>Using logistic regression for single-exposure analysis, we identified exposures associated with type 2 diabetes, adjusting for age, BMI, household income, and self-reported sex and race. To compare cumulative genetic and environmental effects, we computed an overall clinical score (OCS) as a weighted sum of BMI and prediabetes, hypertension, and high cholesterol status and a polyexposure score (PXS) as a weighted sum of 13 environmental variables. Using UK Biobank data, we developed a multiancestry PGS and calculated it for participants.<bold>Results: </bold>We found 76 significant associations with type 2 diabetes, including novel associations of asbestos and coal dust exposure. OCS, PXS, and PGS were significantly associated with type 2 diabetes. PXS had moderate power to determine associations, with larger effect size and greater power and reclassification improvement than PGS. For all scores, the results differed by race.<bold>Conclusions: </bold>Our findings in a multiancestry cohort elucidate how type 2 diabetes odds can be attributed to clinical, genetic, and environmental factors and emphasize the need for exposome data in disease-risk association studies. Race-based differences in predictive scores highlight the need for genetic and exposome-wide studies in diverse populations.
- Subjects
UNITED Kingdom; TYPE 2 diabetes; COAL dust; INCOME; LOGISTIC regression analysis; ENVIRONMENTAL risk
- Publication
Diabetes Care, 2023, Vol 46, Issue 5, p929
- ISSN
0149-5992
- Publication type
Article
- DOI
10.2337/dc22-0295