Apart from low Hb (OR 0.97,95% CI [0.95–0.99]; P =0.002), fasting glucose (OR 1.10,95% CI [1.00–1.20]; P =0.043), Iohexol (OR 4.55,95% CI [1.37–15.14]; P =0.014), WBC count (OR 1.12,95% CI [1.03–1.21]; P =0.006) remained significant and independent in predicting the occurrence of CI-AKI. The gene discussed is GSTM1; the disease is acute kidney injury.