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Table 2 Demographic data for the overall study population and in the obese and non-obese subgroups

From: Ultrasound-guided percutaneous tracheostomy in critically ill obese patients

  Global population
(n = 50)
Obese
(n = 26)
Non-obese
(n = 24)
P value
Age, years 62 (46-72) 64 (50-74) 58 (46-64) 0.62
Male gender 36 (72%) 19 (70%) 17 (74%) 0.4
Body mass index, kg/m2 31 (25-35) 34 (32-38) 25 (24-28) < 0.001
SAPS II 41 (31-57) 40 (25-47) 47 (36-58) 0.06
Diagnosis on admission     0.9
   Cardiogenic shock 1 (2%) 1 (4%) 0  
   Acute respiratory distress syndrome 15 (30%) 10 (38%) 5 (20%)  
   COPD failure 4 (8%) 2 (8%) 2 (8%)  
   Neurological problem 3 (6%) 2 (8%) 1 (4%)  
   Cardiac surgery 14 (28%) 8 (30%) 6 (25%)  
   Vascular surgery 2 (4%) 1 (4%) 1 (4%)  
   Thoracic surgery 3 (6%) 0 3 (13%)  
   Visceral surgery 5 (10%) 2 (8%) 3 (13%)  
   Polytrauma 3 (6%) 0 3 (13%)  
MV before tracheostomy, days 22 (16-29) 21 (16-29) 22 (19-29) 0.24
Time to decannulation, days 23 (15-32) 26 (13-34) 21 (16-31) 0.66
  1. Values are expressed as the median (25th-75th percentiles) or as number (percentage). COPD, chronic obstructive pulmonary disease; MV, mechanical ventilation; SAPS II, Simplified Acute Physiology Score II.