GSTM1 and chronic kidney disease: In a multivariate logistic regression analysis using variables with P < .1 from the comparison analysis, female sex (OR 2.606, 95% CI 1.283–5.295, P = .008), malignancy (OR 5.098, 95% CI 1.725–15.061, P = .003), CKD stage ≥ 3 (OR 3.258, 95% CI 1.603–6.622, P = .001), and low preoperative Hb < 12 g/dL (OR 4.684, 95% CI 2.230–9.837, P < .001) were significantly associated with perioperative ABT.