AID in fathers were associated with ADHD in offspring (Unadjusted, only two studies, adjusted OR 1.14 [95% CI 1.10; 1.17] p < 0.0001, [I2 = 0%, Tau2 = 0 p = 0.29]) (Fig. 3C). This evidence concerns the gene AICDA and attention deficit-hyperactivity disorder.