Linear regression analysis showed that cystatin C, fibrinogen, hs‐CRP, TAS, and homocysteine levels were the most significant predictors of CAD severity (r = 0.631, r = 0.023, r = 0.37, r = 0.136, and r = 0.039; P < 0.05, respectively). Here, CRP is linked to coronary artery disorder.