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Table 2 Characteristics of the noninvasive positive pressure ventilation (NPPV) and the conventional mechanical ventilation (CMV) groups according to nonmatching criteria

From: Early fiberoptic bronchoscopy during non-invasive ventilation in patients with decompensated chronic obstructive pulmonary disease due to community-acquired-pneumonia

  NPPV (n = 15) CMV (n = 15) P
Age, years, mean (SD) 80 (5) 73 (5) 0.001
Male, n (%) 12 (80) 9 (60) 0.427
BMI, Kg/m2, mean (SD) 25 (4) 26 (3) 0.509
FEV1, % of pred., mean (SD)a 30 (5) 31 (5) 0.866
FVC, % of pred., mean (SD)a 39 (8) 42 (8) 0.262
PaO2, mmHg, mean (SD)a 51 (3) 54 (3) 0.105
PaCO2, mmHg, mean (SD)a 59 (5) 57 (4) 0.257
pH, mean (SD)a 7.39 (0.02) 7.40 (0.03) 0.514
Charlson score, median (IQR) 2 (1-2) 1 (1-1) 0.041
Exacerbations, median (IQR)b 1.7 (0.9) 1.1 (1.0) 0.600
Antibiotic use, n (%)c 5 (33.3) 6 (40.0) 0.705
DNR order, n (%) 2 (13.3) 0 (0.0) 0.483
Pre-MV hospital, days median (IQR) 1 (1-2) 1 (1-2) 0.646
RR, bpm, mean (SD) 34 (4) 36 (3) 0.160
HR, bpm, mean (SD) 102 (12) 108 (12) 0.224
PS, cmH2O, mean (SD) 18 (4) 17 (4) 0.445
  1. BMI, body mass index; DNR, do-not-resuscitate; FEV1, forced expiratory volume in the first second; FVC, forced vital capacity; HR, heart rate; IQR, interquartile range MV, mechanical ventilation; PaCO2, partial pressure of arterial carbon dioxide; PaO2, partial pressure of arterial oxygen; PS, pressure support; RR, respiratory rate; SD, standard deviation.
  2. a stable status within the previous 6 months.
  3. b within the previous 12 months.
  4. c within the previous 3 months.