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Table 3 Regression analysis to evaluate the association between survival and covariates

From: Prone position ventilation-induced oxygenation improvement as a valuable predictor of survival in patients with acute respiratory distress syndrome: a retrospective observational study

Variables and parameters

aOR/ aHR

95% CI

p value

Multivariate logistic regressiona

 P/F ratio responders

0.207

0.071–0.56

0.003

 PaCO2 responders

0.219

0.073–0.61

0.005

 Age

1.047

1.011–1.092

0.018

 Immunocompromised

6.49

2.268–21.084

0.001

 Septic shock

3.35

1.196–10.19

0.025

Multivariate cox regression

 Model 1 (28 days)

  P/F ratio responders

0.229

0.076–0.686

0.009

  Age

1.03

0.997–1.064

0.074

 Model 2 (60 days)

  P/F ratio responders

0.369

0.171–0.798

0.011

  Immunocompromised

2.005

1.058–3.799

0.033

  age

1.017

0.994–1.042

0.156

  Septic shock

1.693

0.867–3.305

0.123

  1. Abbreviations: aOR adjusted odds ratio, aHR adjusted hazard ratio, CI confidence interval, PaCO2 arterial partial pressure of carbon dioxide, P/F PaO2:FiO2
  2. aHosmer–Lemeshow goodness-of-fit test, p = 0.235; Brier value = 0.183; concordance index = 0.822
  3. The assumptions of proportional hazards were satisfied (pmodel1 = 0.75; pmodel2 = 0.326)
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BMC Pulmonary Medicine

ISSN: 1471-2466

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