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Annals of Intensive Care

Table 2 Mortality and ventilator-free days across severity categories

From: P/FP ratio: incorporation of PEEP into the PaO2/FiO2 ratio for prognostication and classification of acute respiratory distress syndrome

 

P/F ratio

P/FP ratio

Outcomes

Severe (≤ 100) N = 640

MoNderate (101–200)

N = 1,928

Mild (201–300) N = 839

P value for trend

Severe (≤ 100) N = 794

Moderate (101–200)

N = 1,252

Mild (201–300)

N = 640

P value for trend

Hospital mortality, N (%)

295 (46.1)

549 (28.5)

204 (24.3)

 < 0.001

340 (42.8)

358 (28.6)

161 (25.1)

 < 0.001

Ventilator-free days (IQR)

3 (0–17)

17 (0–22)

21 (1.25–24)

 < 0.001

1.5 (0–17)

17 (0–22)

19 (0–23)

 < 0.001

  1. P values refer to comparisons of hospital mortality and ventilator-free days between patients classified as having severe, moderate, and mild ARDS.  IQR  interquartile range, P/F =ratio of the PaO2 to FiO2; P/FP = (PaO2 * 10)/(FiO2 * PEEP)
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