After adjusting for age and gender, smoking (OR = 2.180, 95% CI: 1.149–4.134, p = .017), diabetes (OR = 3.196, 95% CI: 1.799–5.642, p < .001), TG (OR = 1.597, 95% CI: 1.179–2.162, p = .002), HDL‐C (OR = 0.116, 95% CI: 0.046–0.289, p < .001), FBG (OR = 1.148, 95% CI: 1.024–1.286, p = .018), IL‐4 (OR = 0.576, 95% CI: 0.431–0.770, p = .007), and IL‐17 (OR = 0.920, 95% CI: 0.875–0.967, p = .001) were still found to be correlated with CAD. This evidence concerns the gene IL17A and diabetes mellitus.