Table 2.

Variables included in the Cox proportional hazards survival model and hazard ratios ^a

Characteristics	Odd ratio (95% confidence interval)	P
Age	1.001 (0.994 to 1.008)	0.749
Presence of chronic ill health	1.211 (0.941 to 1.558)	0.137
APACHE II score	1.058 (1.041 to 1.076)	<0.001
Presence of sepsis	1.015 (0.806 to 1.279)	0.896
Presence of severe hypophosphatemia episode during CVVH therapy	0.943 (0.699 to 1.272)	0.700

^aAPACHE II, Acute Physiology Chronic Health Evaluation II; CVVH, continuous veno-venous hemofiltration.