Odds ratio of diabetes by genetic African ancestry.

ARIC, the Atherosclerosis Risk in Communities Study; JHS, the Jackson Heart Study; MEC, the Multiethnic Cohort; BMI, body mass index (calculated as weight in kilograms divided by height in meters squared); SES, socioeconomic status (including education, income and occupation).
aExcess risk explained is defined as (θ1−θ2)/(θ1−1) where θ1 is the odds ratio of diabetes due to increase in African ancestry in Model 1; θ2 is the odds ratio after additional adjustment for covariates in each model; and θ1−1 is the excess odds of diabetes due to increase in African ancestry.
bModel 1: odds ratio (95% confidence interval) is adjusted for age, sex, and study.
cModel 2: odds ratio (95% confidence interval) is adjusted for covariates in Model 1 and BMI.
dModel 3: odds ratio (95% confidence interval) is adjusted for covariates in Model 1 and SES.
eModel 4: odds ratio (95% confidence interval) is adjusted for covariates in Model 1, BMI, and SES.
fP<0.05, as compared to the reference tertile.
gP<0.001, as compared to the reference tertile.