Genotypic interaction with logistic regression by INTERSNP developed by Cordell and Clayton [20,21].

A: Additive; D: Dominant; OR: odds ratio; 95% CI: 95% confidence interval. aOR and 95% CI before adjustment for age and gender. bOR and 95% CI after adjustment for age and gender. Genotypic interaction with logistic regression by INTERSNP developed by Cordell and Clayton [20,21].