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Table 2 Severity of ARDS defined by minimal PaO2/FIO2 ratio and outcome.

From: Relationship between extravascular lung water and severity categories of acute respiratory distress syndrome by the Berlin definition

 

mild ARDS

(n= 33)

moderate ARDS

(n= 83)

severe ARDS

(n= 79)

Ventilator-free days

within 28 days

18 (1-22)

9 (0-19)

0 (0-18)*

 

28-day mortality

Unadjusted

odds ratio

95% confidence interval

P value

mild ARDS

(n = 33)

18.2%

(n = 6)

1

(reference)

 

moderate ARDS

(n = 83)

38.6%**

(n = 32)

2.824

1.050-7.590

0.048

severe ARDS

(n = 79)

48.1%**

(n = 38)

4.167

1.553-11.236

0.003

  1. *P <0.01 vs. mild ARDS; **P <0.05 vs. mild ARDS. ARDS, acute respiratory distress syndrome.