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Table 1 Patient characteristics

From: The global inhomogeneity index assessed by electrical impedance tomography overestimates PEEP requirement in patients with ARDS: an observational study

  ARDS Control p-value
Number of patients (%) 28 (62) 17 (38)  
Sex, M/F 17/11 14/3  
APACHE II (SD) 28 (8) 17 (5) < 0.001*
Age, years (SD) 63 (16) 66 (14) 0.527
BMI, kg/m2 (SD) 26 (5) 27 (5) 0.507
Tidal volume, ml/kg PBW (SD) 7.7 (2.1) 7.2 (1.1) 0.372
PaO2/FiO2, mmHg (SD) 137 (49) 339 (73) < 0.001*
Set PEEP, mmHg (SD) 12.2 (2.6) 7.9 (0.5) < 0.001*
FiO2, % (SD) 0.67 (0.19) 0.39 (0.07) < 0.001*
Cdyn, ml/cmH2O (SD) 43 (20) 54 (15) 0.0499*
Type of admission
 Post CTS, n (%)   17 (38)  
 Pneumonia, n (%) 16 (36)   
 Sepsis, n (%) 9 (20)   
 Other, n (%) 3 (7)   
ARDS
 Mild, n (%) 2 (7)   
 Moderate, n (%) 19 (68)   
 Severe, n (%) 7 (25)   
  1. Data are presented as means ±SD and as the number of patients (%), where appropriate. APACHE II, Acute Physiology And Chronic Health Evaluation II; BMI, body mass index; PBW, predicted body weight; PEEP, positive end-expiratory pressure; Cdyn, dynamic respiratory system compliance; CTS, postoperative cardiothoracic surgery patients; ARDS, acute respiratory distress syndrome. (* p < 0.05)