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Table 1 Baseline characteristics of the study population in relation to ICU mortality

From: Effect of mechanical power on intensive care mortality in ARDS patients

 

Survivors, N = 134

Non-survivors, N = 88

p

Age (years)

60 [43–70]

64 [54–75]

0.005

Female, N (%)

38 (31%)

31 (35%)

0.48

BMI (kg/m2)

24.85 [22.67–28.28]

24.25 (22.29–29.02)

0.97

ARDS category, N (%)

  

0.001

 • Mild

32 (24)

9 (10)

 

 • Moderate

90 (67)

50 (57)

 

 • Severe

12 (9)

29 (33)

 

Cause of ARDS, N (%)

  

0.04

 • Pulmonary

76 (57)

37 (42)

 

 • Extrapulmonary

58 (43)

51 (58)

 

PaO2/FiO2

195 [146–231]

153 [115.33–189.28]

0.001

PaCO2 (mmHg)

40 [35.92–4]

44.45 [39.15–52.9]

0.001

Respiratory rate (bpm)

16 (13–20)

17.5 (14–20)

0.07

Tidal volume (mL)

510 [450–600]

480 [420–550]

0.004

Tidal volume/body weight (mL/kg)

7.93 [7–9.1]

7.82 [6.7–8.47]

0.12

Clinical PEEP (cmH2O)

10 [10–12.5]

10 [10–12]

0.68

Driving pressure (cmH2O)

12.58 ± 3.31

14.03 ± 3.48

0.004

Respiratory system elastance (cmH2O/mL)

23.91 [18.44–29.15]

28.57 [22.97–34.87]

0.001

SAPS II

36 [29–47]

44 [37.75–56]

0.001

Intensive care unit stay (days)

19.5 [11.5–30.5]

15 [8–24]

0.009

  1. Quantitative data are expressed as mean (standard deviation, SD) or median [interquartile range] as appropriate. Categorical data are presented as N (number of subjects) and percentages (%). Student’s t test or Wilcoxon-Mann-Whitney test, as appropriate, were used for continuous variable analysis, while chi-squared test were used for categorical variable analysis
  2. BMI body mass index, ARDS acute respiratory distress syndrome, SAPS Simplified Acute Physiology Score
  3. Italicized data are for statistically significant results