Then we further included the history of chronic kidney disease, lymphocyte count, NLR, serum Cystatin C, serum creatinine, BNP, cardiopulmonary bypass time, ACC time, and LVEF in the multivariate logistic regression analysis, the results showed that patients with higher preoperative NLR had greater risk of AKI [odds ratio (OR) = 4.91, 95% confidential interval (CI) 1.45–16.58, p = 0.0104], and patients with higher preoperative serum creatinine also had greater risk of AKI after surgery (OR = 1.054, 95% CI 1.006–1.105, p = 0.026), as shown in Table 3. Here, NPPB is linked to acute kidney injury.