. Author manuscript; available in PMC: 2013 Oct 1.

Published in final edited form as: Crit Care Med. 2012 Oct;40(10):2883–2889. doi: 10.1097/CCM.0b013e31825bc54d

Table 3.

Results of the multivariable analysis of factors associated with ventilator-free days.

Clinical Covariates	Regression Coefficient	p value
Cumulative Day 3 Fluid Balance (ml/kg)	−0.02	0.01
PRISM III	−0.25	0.03
Age (yrs)	−0.12	0.35
Gender, Male	0.16	0.91
Race, White	−0.09	0.95
PaO₂/FiO₂ at Study Entry	0.02	0.08
Vasopressor Use at Study Entry	−2.77	0.08

PRISM, Pediatric Risk of Mortality

Multivariable linear regression model was used to assess the association between clinical covariates and ventilator-free days. Clinical covariates were retained in the model if the univariate p value was < 0.2. Age, gender and race were kept in the multivariate model due to clinical relevance.