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Table 1 Baseline characteristics of the study population and events during follow-up

From: Impact of prone position on dead-space fraction in COVID-19 related acute respiratory distress syndrome

 

n (%), [IQR]

Patients included

85

Baseline characteristics

 

 Age, years

62 [49–75]

 Female sex

25 (29)

 SAPS II

41 [25–57]

 BMI, kg/m2

32 [25–39]

 Hypertension

51 (60)

 Diabetes

33 (39)

 Cardiomyopathy

23 (27)

 Chronic kidney failure

17 (20)

 Active Smoking

13 (15)

 COPD

14 (16)

 Chronic respiratory insufficiency

18 (21)

 Sars-CoV-2 vaccination

16 (19)

Tomodensitometry findings

 

 Percentage of pulmonary infiltrate

 

  0–25%

6 (7)

  26–50%

27 (32)

  51–75%

30 (35)

  > 75%

22 (26)

 Pulmonary embolism

12 (14)

Treatments before invasive mechanical ventilation

 

 High-flow nasal oxygen

28 (33)

 Non-invasive ventilation

55 (65)

 Dexamethasone

85 (100)

 Tocilizumab

6 (7)

 Nirmatrelvir/ritonavir

1 (1)

 Tixagevimab/cilgavimab

2 (2)

 Remdesivir

2 (2)

Intensive care unit

 

 Neuromuscular agent blockade

85 (100)

 Inhaled NO

24 (28)

 Renal replacement therapy

20 (24)

 VV-ECMO*

5 (6)

 Norepinehrine

50 (59)

 Duration of prone position, h

18 [16–20]

 Prone position sessions

5 [1–9]

 Duration of invasive mechanical ventilation, d

27 [7–47]

 Length of ICU stay, d

30 [9–51]

 Day 90 mortality

37 (44)

 Day 90 ventilatory-free days alive

34 (29)

  1. Abbreviations: BMI, body mass index; COPD, chronic obstructive pulmonary disease; ICU, intensive care unit; IQR, interquartile range; NO, nitric oxide; SAPS, simplified acute physiology score; SARS-CoV-2, severe acute respiratory syndrome coronavirus 2; VV-ECMO, veno-venous extracorporeal membrane oxygenation
  2. *the 5 patients were proned before VV-ECMO initiation