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Table 2 Multivariate logistic regression and Cox regression analyses of risk factors influencing ICU mortality

From: Nucleated red blood cells as predictors of mortality in patients with acute respiratory distress syndrome (ARDS): an observational study

Multivariate logistic regression

p value

OR

95% CI

APACHE II (admission)

< 0.001

1.04

1.02–1.07

pulmonary compliance (admission)

< 0.001

0.95

0.94–0.97

NRBCs (at ICU admission)

0.035

3.25

1.09–9.73

NRBC cutoff (220/µl)

< 0.001

3.21

1.93–5.35

Cox regression

p value

HR

95% CI

APACHE II (admission)

< 0.05

1.02

1.00–1.04

pulmonary compliance (admission)

< 0.001

0.97

0.96–0.99

NRBC > 220/µl

< 0.05

1.41

1.00–1.99

  1. Parameters considered in the multivariate regression models using backwards selection that had significant impact in univariate analyses: age, gender; ICU admission scores (APACHE, SOFA); severe ARDS (yes/no); P peak (peak ventilatory pressure); pulmonary compliance; NRBC (yes/no > 220/µl); (ECMO (yes/no). Data of 404 patients were considered. NRBC cutoff 220/µl was used for analysis. OR odds ratio; CI confidence interval; HR hazard ratio; APACHE II Acute Physiology And Chronic Health Evaluation II; NRBC nucleated red blood cells
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