ALDH2 and Alzheimer disease: Potential associations were found between the <i>ALDH2</i> rs671 G>A polymorphism and the risk of AD (A vs. G: OR = 1.46, 95%CI = 1.01-2.11, <i>P</i> = 0.05, <i>I</i> <sup>2</sup> = 84.2%; AA vs. GG: OR = 2.22, 95%CI = 1.03-4.77, <i>P</i> = 0.04, <i>I</i> <sup>2</sup> = 79.2%; AA vs. GG+GA: OR = 1.94, 95%CI = 1.03-3.64, <i>P</i> =0.04, <i>I</i> <sup>2</sup> = 71.1%).