INS and Insulin resistance: Fasting glucose levels were not significantly different, whereas fasting insulin levels and insulin resistance were increased in the CO patients (10.6 ± 5.8 vs 6.5 ± 2.8 miu/L, P = 0.019 and 2.11 ± 1.08 vs 1.4 ± 0.64, P = 0.038, respectively).