GCG and coronary artery disorder: Elevated plasma glucagon levels were significantly associated with an increased risk of CAD in all models (Model 1: OR, 1.038; 95% CI, 1.009-1.069; P < 0.05; Model 2: OR, 1.046; 95% CI, 1.013-1.080; P < 0.01; Model 3: OR, 1.049; 95% CI, 1.011-1.087; P < 0.05).