CALCA and acute kidney injury: In the multivariate analysis, higher phosphate (p=0.002, RR 1.39, CI 95% 1.13–1.72), PCT level >0.5 ng/ml on hospitalization (p=0.005, RR 2.09, CI 95% 1.26–3.50), and >15 points on APACHE (p=0.011; RR 2.0 CI 95% 1.17–3.40) showed a significant association with the development of AKI (Table 3).