ALDH2 and Hypertension: The ALDH2 G/A genotype in the co-dominant model (ALDH2 G/A vs. ALDH2 G/G) (age-, smoking-, and drinking-adjusted OR 1.251, 95% CI 1.024–1.528, P = 0.028) and ALDH2 A/A genotype in the recessive model (ALDH2 A/A vs. ALDH2 G/G plus ALDH2 G/A) (age-, smoking-, and drinking-adjusted OR 1.221, 95% CI 1.008–1.478, P = 0.041) were significant risk factors for the presence of hypertension.