INS and diabetes mellitus: Previous studies addressing the prognostic relevance of DM in patients hospitalized with AMI have considered DM as a dichotomous variable (yes vs. no) and only a few assessed the risk of in-hospital death in relation to known or unknown DM, chronic glycemic status, as estimated by the glycated hemoglobin, and anti-hyperglycemic therapy (oral vs. insulin) before index hospitalization [1–12].