INS and diabetes mellitus: Elevated levels of Insulin-Like Growth Factor-1 (IGF-1) were found to be associated with increasing age, longer duration of Diabetes Mellitus (DM), higher HbA1c, and higher Quantitative Insulin Sensitivity Check Index (QUICKI) value (P = 0.050, P = 0.044, P = 0.001, and P = 0.039 respectively).