Table 4. Analysis of predictors of failure to recover renal function.

Characteristic	Odds ratio (95% CI) (unadjusted)	P-value	Odds ratio (95% CI) (adjusted)	P-value
Age (per 5 years)	1.11 (1.01–1.23)	0.03	1.09 (0.96–1.24)	0.20
Creatinine on the first day of RIFLE-F	1.47 (1.18–1.84)	<0.001	1.32 (1.07–1.64)	0.011
PSI on day 1 (per 10 points)	1.12 (1.03–1.21)	0.007	0.99 (0.90–1.10)	0.9039
Maximum nonrenal SOFA score (per 2 points)	1.23 (1.03–1.48)	0.025	1.37 (1.09–1.74)	0.0078
pNGAL (per 300 ng/ml)	3.31 (1.82–4.46)	<0.001	2.02 (1.03–3.31)	0.0155

Abbreviations: CI, confidence interval; pNGAL, plasma neutrophil gelatinase-associated lipocalin; PSI, pneumonia severity index; RIFLE, Risk, Injury, Failure, Loss, and End-stage Kidney Disease; SOFA, sequential organ failure assessment.