ALDH2 and esophageal cancer: Using subjects with the ALDH2 GG genotype as a reference, ORs for esophageal cancer among male individuals with GA and AA genotypes were 2.75 (95% CI, 2.34–3.23) and 0.08 (95% CI, 0.00–0.35), respectively, whereas those in women were 2.99 (95% CI, 1.43–6.34) and 6.18 (95% CI, 1.40–19.62), respectively.