Fig. 3.
Postoperative outcome by severity of acute kidney injury (AKI) in noncardiac compared with cardiac surgery patients. (A) Mortality in noncardiac surgery compared with cardiac surgery patients is higher in subgroups with less severe AKI, **P < 0.01 (chi-square tests). (B) After multivariable adjustment, noncardiac surgery is associated with higher risk of in-hospital death in patients with less severe AKI; data from four multivariable binary logistic regression models, one for each subgroup of AKI severity (odds ratios and 95% CIs). (C) Hospital length of stay is not longer in noncardiac surgery patients compared with cardiac surgery patients in subgroups with less severe AKI (Mann–Whitney U tests). (D) After multivariable adjustment, noncardiac surgery is associated with longer hospital stay in patients with less severe AKI; coefficients from four robust regression models, one for each subgroup of AKI severity (βs and 95% CIs). Cr = creatinine; KDIGO = Kidney Disease: Improving Global Outcome; ns = not significant.