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Table 3 Extended respiratory mechanics and clinical assessment of the study population during supine position and prone position

From: Awake prone position reduces work of breathing in patients with COVID-19 ARDS supported by CPAP

  Supine
N = 40
Prone
N = 40
p Mean difference [95% CI]
Esophageal pressure swing, cmH2O − 7 [− 9 to − 5] − 6 [− 9 to − 5] 0.306 0.4 [− 0.4 to 1.1]
Dynamic transpulmonary pressure, cmH2O 17 [14 to 19] 16 [14 to 18] 0.34 − 0.4 [− 1.1 to 0.4]
Modified pressure–time product, cmH2O/min 152 [104 to 197] 118 [90 to 150]  < 0.001 − 33 [− 47 to − 19]
Work of breathing, cmH2O * L /min 146 [120 to 185] 114 [95 to 151]  < 0.001 − 27 [− 38 to − 17]
Borg Dyspnea Scale
0—none
1—very light
2—light
3—moderate
4—rather intense
29 (72)
3 (8)
5 (12)
1 (2)
2 (5)
37 (92)
2 (5)
1 (2)
0 (0)
0 (0)
0.005 − 0.5 [− 0.8 to − 0.2]
Non-invasive Work of Breathing Scale
1
2
3
4
20 (50)
12 (30)
5 (12)
3 (8)
31 (78)
8 (20)
1 (2)
0 (0)
0.001 − 0.5 [− 0.9 to − 0.2]
  1. CI confidence interval
  2. Data are presented as median [interquartile range] for continuous values unless otherwise specified
  3. Supine Position taken as reference