ABCG1 and coronary artery disorder: In females, six out of eight CpG loci showed lower methylation in the CHD cases than in the controls (ABCG1_CpG_2, ABCG1_CpG_4, ABCG1_CpG_7.10, ABCG1_CpG_8, and ABCG1_CpG_9, ORs per −10% methylation ranging from 1.58 to 2.93, p < 0.013 for all by logistic regression model B, Fig. 3A, Additional file 1: Table S6).