SNP×SNP interactions for presence and number of carotid plaque with a nominal p≤0.01.

*Psnp1, Psnp2, Pinteraction and beta were, respectively, p-value for SNP1 main effect, p-value for SNP2 main effect, p-value and regression coefficient for their interactive effect, based on Logistic (plaque presence) and Poisson (plaque count) regression models after adjusting for age, sex, smoking, hypertension, diabetes and waist-to-hip ratio as well as genomic control variables (PCAs) if applicable.