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Table 3 Anatomical and ultrasound-guided percutaneous tracheostomy data in the overall study population and in the obese and non-obese subgroups

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

  Study population
(n = 50)
Obese
(n = 26)
Non-obese
(n = 24)
P value
Short neck 26 (52%) 17 (64%) 9 (38%) 0.05
Tracheal deviation 9 (18%) 4 (15%) 5 (21%) 0.72
Cricoid-manubrium distance, cm 5.5 (4.5-7) 5 (4.2-6) 6 (4.7-7) 0.05
Subcutaneous tissue thickness, cm 1.01 (0.77-1.45) 1.29 (0.96-1.59) 0.97 (0.68-1.15) 0.01
Trachea diameter, cm 2.1 (1.9-2.2) 2.1 (1.9-2.2) 2 (2-2.2) 0.24
Ultrasound examination time, minutes 10 (5-12) 10 (5-12) 10 (7-13) 0.83
Percutaneous tracheostomy time, minutes 10 (5-12) 9 (5-10) 10 (8-14) 0.1
Total time, minutes 18 (15-25) 17 (15-23) 20 (16-26) 0.36
Numerical scalea     0.5
   1: Easy 24 (48%) 12 (46%) 12 (50%)  
   2: A few difficulties 16 (32%) 8 (31%) 8 (33%)  
   3: Moderate difficulties 9 (18%) 6 (23%) 3 (13%)  
   4: Very difficult 1 (2%) 0 1 (4%)  
   5: Impossible 0 0 0  
  1. Values are expressed as the median (25th-75th percentiles) or as number (percentage). aNumerical scale of difficulty in achieving ultrasound-guided percutaneous tracheostomy.