INS and coronary artery disorder: The pooled relative risk of CHD per one standard deviation increase was 1.21 (95% CI: 1.13, 1.30; I2∶64.9%) for glucose, 1.04 (95% CI: 0.96, 1.12; I2∶43.0%) for insulin and 1.46 (95% CI: 1.26, 1.69; I2∶0.0%) for HOMA-IR.