GJA1 and atrial fibrillation: For GJA1 SNP rs13216675, significant genotypic association was identified for AF under an additive model and a dominant model, but not under a recessive model (Pobs = 6.72 × 10−3, Padj = 0.01 under an additive model; Pobs = 2.28 × 10−3, Padj = 3.04 × 10−3 under a dominant model; Pobs = 0.07, Padj = 0.14 under a recessive model) (Table 3).