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Table 1 Demographic data and baseline characteristics. Data are presented as mean (standard deviation), median (quartiles), and frequency (%)

From: Thoracic fluid content: a novel parameter for predicting failed weaning from mechanical ventilation

  Failed weaning (n = 23) Successful weaning (n = 41) p value
Age (years) 54.4 (20.2) 43.9 (15.6) 0.057
Male gender (%) 19 (83%) 21 (51%) 0.012*
APACHE II 18 (12, 23) 19 (15, 22) 0.17
Duration of mechanical ventilation before SBT (days) 3 (2, 6) 3 (2, 4) 0.17
Number of previous SBT 1 (1, 2) 1 (0, 1) 0.32
Pre-SBT day balance (mL) 215 (1102) 20 (929) 0.899
SBT day balance (mL) − 262 (713) − 234 (782) 0.481
Blood hemoglobin (g dL−1) 10(1.5) 10.6(2.2) 0.046*
Chronic obstructive pulmonary disease (%) 5 (22%) 1 (2%) 0.02*
Abdominal surgery (%) 10 (44%) 20 (49%) 0.44
  1. APACHE Acute physiology and chronic health evaluation, SBT spontaneous breathing trial
  2. *Denotes statistical significance