Table 3.

Multivariate proportional hazard model analysis of risk factors for hospital mortality.

Risk factor	HR	95% CI	P value
Non-AKI	Reference	Reference	<0.001
Transient AKI	2.582	1.025–6.505	0.044
Persistent AKI	6.974	3.334–14.588	<0.001
Oxygenation index	0.992	0.988–0.996	<0.001

Abbreviations: AKI: acute kidney injury; HR: hazard ratio; CI: confidence interval.