In a multivariate logistic regression models adjusted with treatment for dyslipidemia and use of warfarin, elevated levels of IL-9 (OR 1.828, 95%CI 1.070–3.157, p = 0.027), IL-17 (OR 2.361, 95%CI 1.164–4.789, p = 0.017) and TNF-α (OR 2.020, 95%CI 1.041–3.923, p = 0.038) were independent predictors of CAD also in diabetic patients. This evidence concerns the gene IL17A and metabolic syndrome.