Table 3.

Logistic regression models for 90-day mortality among all patients with RRT and among patients with classic RRT

Covariate	Univariate Odds Ratio (95% CI)	P Value	Multivariate Odds Ratio (95% CI)	P Value
All patients on RRTa
Age (5 yr)	1.18 (1.07 to 1.30)	0.001	1.20 (1.06 to 1.36)	0.01
Number of preexisting chronic illnessesb	1.03 (0.84 to 1.27)	0.77	0.94 (0.72 to 1.23)	0.66
Study site	—	0.15	—	0.90
Source of admission	—	0.18	—	0.54
SAPS II score without age points	1.07 (1.05 to 1.09)	<0.001	1.06 (1.04 to 1.09)	<0.001
Mechanical ventilation (ICU stay)	3.65 (1.82 to 7.32)	<0.001	2.93 (1.23 to 6.96)	0.02
Vasoactive drugs (ICU stay)	3.10 (1.29 to 7.41)	0.01	1.30 (0.41 to 4.12)	0.66
Severe sepsis until day 5	1.99 (1.18 to 3.37)	0.01	1.16 (0.61 to 2.24)	0.58
Time from ICU admission to RRT (h)	1.00 (0.99 to 1.01)	0.93	1.01 (0.98 to 1.02)	0.17
CRRT as initial modality	0.50 (0.26 to 0.95)	0.04	0.97 (0.42 to 2.21)	0.94
Classic RRT (versus pre-emptive RRT)	2.25 (1.31 to 3.86)	0.003	2.05 (1.03 to 4.09)	0.04
Patients on classic RRTc
Age (5 yr)	1.21 (1.03 to 1.41)	0.02	1.32 (1.09 to 1.62)	0.01
Study site	—	0.61	—	0.75
SAPS II score without age points	1.07 (1.04 to 1.10)	<0.001	1.08 (1.04 to 1.12)	<0.001
Mechanical ventilation (ICU stay)	6.36 (2.79 to 14.49)	<0.001	4.14 (1.57 to 12.39)	0.01
Vasoactive drugs (ICU stay)	2.30 (0.87 to 6.08)	0.09	0.42 (0.09 to 1.76)	0.40
Severe sepsis until day 5	1.85 (0.93 to 3.68)	0.08	1.19 (0.48 to 2.94)	0.71
CRRT as initial modality	0.47 (0.20 to 1.06)	0.07	0.96 (0.31 to 3.04)	0.95
Classic-delayed RRT (versus classic–urgent RRT)	3.37 (1.57 to 7.22)	0.002	3.85 (1.48 to 10.22)	0.01

CRRT, continuous RRT; 95 % CI, 95% confidence interval.

^aModel included all 239 patients. Hosmer–Lemeshow test=9.82; P=0.28.

^bIn total, 10 of 239 (4.2%) patients with missing data were assumed to have no comorbidities.

^cModel included all 134 patients. Hosmer–Lemeshow test=3.13; P=0.93.