NPPB and acute kidney injury: The pooled SEN of NT-proBNP in predicting CSA-AKI was 0.67 (95% CI = 0.56–0.77); the pooled specificity was 0.55 (95% CI = 0.45–0.64); the pooled predictive odds ratio was 2.46 (95% CI = 1.60–3.79); the pooled positive likelihood ratio was 1.48 (95% CI = 1.23–1.78); the pooled negative likelihood ratio was 0.60 (95% CI = 0.46–0.79); and the area under the SROC curve was 0.65 (95% CI = 0.60–0.69).