INS and metabolic syndrome: Area under curve (AUC) for various steady state surrogate markers for insulin resistance in diagnosing metabolic syndrome was highest for HOMA-TG index [0.706 (95% CI 0.638–0.775), p < 0.001)], followed by fasting plasma glucose [0.690 (95% CI 0.621638–0.759), p < 0.001)], FIRI [0.674 (95% CI 0.604–0.745), p < 0.001)], HOMAIR [0.632 (95% CI 0.559–0.705), p = 0.001)], HOMA2 index [0.608 (95% CI 0.535–0.682), p = 0.005)] and serum insulin [0.595 (95% CI 0.521–0.670), p = 0.013)].