Considering more features were not beneficial to clinical use and practice, and the AUCs after 15 variables were overall stable, to facilitate the application in clinical practice, we selected the top 15 critical variables as the brief CIAKI prediction model for diabetes, called the BCPMD model: ACS, Urine protein level, Diuretics, left ventricular ejection fraction (LVEF)(%), Hemoglobin, CHF, Stable Angina, Uric acid, Preoperative DBP, Contrast Volumes, Albumin, Baseline creatinine, Vessels of coronary artery disease, Glucose and Diabetes history (Fig. 4a1 and a2). Here, ALB is linked to diabetes mellitus.