GPT and hydronephrosis: Before 1:1 propensity score matching, sex, age, body mass index, American Society of Anesthesiologist Physical Status, hypertension, atrial fibrillation, cerebrovascular disease, chronic kidney disease, diuretic, calcium channel blocker, plavix, aspirin, hydronephrosis, hemoglobin concentration, serum creatinine level, GFR, serum albumin level, aspartate aminotransferase, alanine aminotransferase, serum chloride level, and serum uric acid level were significantly different between the two groups (Table 1).