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Table 1 Baseline characteristics and diseases that led to acute respiratory failure of the study groups

From: Noninvasive ventilation immediately after extubation improves weaning outcome after acute respiratory failure: a randomized controlled trial

Variable NIV
(n= 20)
Oxygen mask
(n= 18)
P valuea
Gender (M/F) 14/6 12/6 1.0
Age (years), mean (SD) 50.79 (17.77) 48.88 (22.38) 0.77
Days of MV, mean (SD) 9.85 (8.05) 9.5 (6.06) 0.88
APACHE II, mean (SD) 16.90 (6.81) 15.28 (5.65) 0.43
Pneumonia, number (%) 16 (80) 16 (88.9) 0.66
COPD, number (%) 7 (35) 3 (16.7) 0.28
Abdominal surgery, number (%) 5 (25) 4 (22.2) 1.0
Sepsis, number (%) 4 (20) 2 (11.1) 0.66
Asthma, number (%) 2 (10) 1 (5.5) 1.0
Cardiac failure, number (%) 2 (10) 1 (5.5) 1.0
  1. aSignificant values with significance level of 0.05. APACHE II, Acute Physiology and Chronic Health Evaluation; COPD, chronic obstructive pulmonary disease; NIV, noninvasive positive-pressure ventilation.