(A) P-values of the conditional logistic regression with a nominal
genotype without BMI adjustment (CLRN). (B) P-values of the
conditional logistic regression with a nominal genotype with BMI
adjustment (CLRN,BMI). (C) P-values of the conditional logistic
regression with a continuous genotype without BMI adjustment
(CLRC). (D) P-values of the conditional logistic regression with a
continuous genotype with BMI adjustment (CLRC,BMI).