Table 1

Comparisons of baseline patient characteristics between participants and non-participants in crossover trial and completing questionnaires

Patient baseline characteristics Crossover trial participants (n=23) Non-participants in crossover
(n= 48)
p1-150value Questionnaire participants (n=51) Non-participants in questionnaire (n=20) p1-151 value
Mean (SD) age (years)53 (11)50  (10)0.453  (11)48  (8)0.1
No of men20420.644180.7
Mean (SD) BMI (kg/m2)31 (5)32 (5)0.932 (5)32 (5)1.0
Median (IQR) AHI/AH (events/h)40 (25–65)41 (28–57)1.041 (28–60)37 (28–69)0.7
Mean (SD) ESS 13 (5)13 (5)0.712 (5)15 (3)0.1
Mean (SD) CPAP (cm H2O)10 (3)9 (2)0.39 (2)9 (2)0.4
  • BMI = body mass index; AHI = apnoea/hypopnoea index; ESS = Epworth Sleepiness Scale; CPAP = continuous positive airway pressure.

  • 1-150 p value for participants v non-participants in crossover trial.

  • 1-151 p value for participants vnon-participants in questionnaire.