ALDH2 and atrial fibrillation: Combinations of drinking and ALDH2 genotype as a new variable were included in the multivariate analysis (Table 4), which showed that age (OR: 1.023; 95% CI, (1.008, 1.038); P = 0.002) and BMI (OR: 1.041; 95% CI, (1, 1.083); P = 0.048) were the risk factors of AF.