INS and diabetes mellitus: In a cohort study conducted in the USA and Canada, Carson et al. [34] showed that diabetic patients treated with Insulin undergoing CABG are younger than non-diabetic patients [mean (SD): 63.8 (10.2) vs. 65.1(1.09)]; Also, consistent with our study, they revealed that male gender predominancy was imperceptible among DM patients (55.4% vs. 74.0% for non-diabetics).