“…Univariate and multivariate logistic regression analyses were performed using the following possible covariates: sex, age, ECOG-PS, staging, body surface area (BSA), anemia, hypoalbuminemia, liver dysfunction (grade 1 or higher aspartate aminotransferase, alanine aminotransferase, total bilirubin elevation), renal dysfunction (creatinine clearance calculated by Cockroft-Gault formula of < 60 mL/min), concomitant hypertension, and co-administration of PPIs and NSAIDs as baseline patient factors; administration of DPP-4 inhibitors or GLP-1 analogs, metformin, sulfonylurea agents or glinides, insulin, sodium-glucose cotransporter 2 inhibitors, and α-glucosidase inhibitors as DM medication influence; and CDDP dosage, treatment courses, dose reduction during the treatment, radiation combination, and development of grade ≥ 2 nausea, vomiting, and anorexia for treatment-related factors according to previous reports 3,4,9,11,[16][17][18][30][31][32][33][34][35][36][37][38] . Previously reported variables that demonstrated potential associations with CIN development in univariate logistic regression analysis (P < 0.20) were considered when building the multivariable model.…”