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Table 2 Impact of the mechanical device on tracheal cuff pressure

From: Efficiency of a mechanical device in controlling tracheal cuff pressure in intubated critically ill patients: a randomized controlled study

Variables Continuous control of P cuff Routine care p values
n = 18 n = 18
Mean airway pressure, cmH2O 14 (10–17) 14 (11–16) 0.679
Mean P cuff, cmH2O 25 (18, 28) 21 (18, 26) 0.17
Coefficient of variation of P cuff, % 19 (11, 26) 20 (12, 25) 0.67
P cuff 20–30 cmH2O
  Yesa 18 (100) 18 (100) NA
  % of timeb 34 (17, 57) 50 (35, 64) 0.184
P cuff <20, cmH2O
  Yesa 17 (94) 18 (100) >0.999
  % of timeb 23 (5, 63) 43 (16, 60) 0.528
P cuff >30, cmH2O    
  Yesa 18 (100) 16 (89) 0.500
  % of timeb 26 (14, 40) 7 (1, 18) 0.002
  1. Data are frequencies (%) or median (interquartile range)
  2. P cuff cuff pressure, NA not applicable
  3. aYes indicates the number of patients with at least one P cuff 20–30, >20, or >30 cmH2O
  4. b% of time indicates all the time spent with P cuff 20–30, >20, or >30 cmH2O reported to the total recording time during each study period