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Table 5 Results of single-factor analysis of the risk factors for tube obstruction

From: Analysis of morbidity, mortality, and risk factors of tracheostomy-related complications in patients with oral and maxillofacial cancer

Variable Obstruction, present, n = 9 (17.6) Obstruction, absent, n = 42 (82.4) p value
Patient-related characteristics    
 Age, years, mean 52.9 55.0 0.348a
 BMI, kg/m2, mean 22.1 22.5 0.706a
 Sex    0.789
  Male 6 (66.7) 26 (61.9)  
  Female 3 (33.3) 16 (38.1)  
 Smoker 5 (59.5) 25 (55.6) 0.826
 Alcohol drinker 4 (44.4) 25 (59.5) 0.407
 Neck height (cm) 45.8 43.2 0.360a
 Pretracheal soft tissue thickness (cm) 9.9 11.8 0.181a
Treatment-related characteristics    0.074
 Type of neck dissection    
  Unilateral 8 (88.9) 24 (57.1)  
  Bilateral 1 (11.1) 18 (42.9)  
 Type of flap used    0.384
  Fasciocutaneous 1 (11.1) 14 (33.3)  
  Musculocutaneous 7 (77.8) 23 (54.8)  
  Osteocutaneous 1 (11.1) 5 (11.9)  
 Type of tube used    0.802
  Single cannula 8 (88.9) 36 (85.7)  
  Double cannula 1 (11.1) 6 (14.3)  
  1. BMI body mass index
  2. aMann-Whitney test was used to analyze continuous variables. Data in the table are presented as numbers (percent), unless otherwise indicated