Table 3.

Multivariate regression analysis, dependent variable: hospital mortality

Variable	OR	95% CI	P value
Internal medicine patient	3.392	1.098 to 10.474	0.034
RRT on WEA	2.224	0.750 to 6.594	0.150
Need for vasopressors on WEA	1.972	1.327 to 2.932	<0.001
SAPS II+TISS at admission on WEA	1.057	0.988 to 1.132	0.108
Age	1.049	0.994 to 1.108	0.084
Duration of MV	1.001	1.000 to 1.002	0.067
Hb value at admission on ICU	0.807	0.654 to 0.995	0.044

Hb, haemoglobin; ICU, intensive care unit; MV, mechanical ventilation; RRT, renal replacement therapy; SAPS II, Simplified Acute Physiology Score II; TISS, Therapeutic Intervention Scoring System; WEA, weaning unit.