CRP and acute kidney injury: On multivariate logistic regression analysis adjusted for age, sex, diabetes mellitus, hypertension, body mass index, hemoglobin, RDW-CV, eGFR, uric acid, CRP, proteinuria, and contrast volume, low PNI was independently associated with an increased risk of AKI (OR 0.96, 95% CI 0.94–0.98, P = 0.001).