ABCG1 and ischemic stroke: In the overall study population, hypermethylation at cg02494239 of the ABCG1 gene was correlated with ischemic stroke (OR = 2.416, 95% CI 1.024–5.700, P = 0.044), and Q4 group of the DNA methylation level at this CpG site was associated with a 3.461 times higher risk of ischemic stroke than Q1 group (OR = 4.461, 95% CI 1.226–16.225, P = 0.023).