“…Actually, stress hyperglycemia was usually found in patients without known pre-existing DM, and there is no agreed definition of stress hyperglycemia in different acute and critical illnesses [8,37]. Dungan et al defined stress hyperglycemia as fasting plasma glucose levels ≥ 126 mg/dl for non-diabetic patients [8], and the definition varies in different studies, such as myocardial infarction (≥ 110, ≥ 120, ≥ 140, ≥ 144, ≥ 180, or ≥ 200 mg/dl) [9,38], surgery (≥ 140 or ≥ 180 mg/ dl) [11,[39][40][41] and critical illness (≥ 126 or ≥ 200 mg/dl) [42,43]. In our study, we defined stress hyperglycemia for non-diabetic patients as ≥ 126, ≥ 140, ≥ 180, and ≥ 200 mg/ dl, and selected a cut-off BG level of ≥ 180 mg/dl to provide a better definition according to multivariate logistic regression and ROC curves.…”