Table 1

Baseline characteristics

Unit/categoryTotal (N=90)MinMax
Demographic information
 Male72 (80%)
 Female18 (20%)
Age at randomisation
 Years50.9 (11.6)26.179.6
 Kg/m230.6 (27.9–35.1)23.954.5
Smoking history
 Non-smoker44 (49%)
 Ex-smoker39 (43%)
 Smoker7 (8%)
Clinical history
Previous CPAP4 (4%)
Asthma14 (16%)
 Type I1 (1%)
 Type II7 (8%)
Cardiovascular disease
 Previous stroke2 (2%)
 Previous TIA1 (1%)
 Ischaemic heart disease5 (6%)
Hypertension23 (26%)
Sleep study
Apnoea-Hypopnoea Index
 Events per hour13.8 (6.2)2.927.7
Oxygen Desaturation Index
 Events per hour9.8 (5.2)0.622
Minimum SpO2
 Per cent83.7 (4.7)7191
Mean SpO2
 Per cent94.2 (1.3)89.897.7
Time <90% of nocturnal SpO2
 Minutes8.3 (2.9–24.8)0315.4
Epworth Sleepiness Scale (ESS)
 Unit score11.9 (3.5)320
  • Categorical variables show frequency (%) and continuous variables show either mean (SD) or median (IQR).

  • *One sleep study failed and inclusion was based on the Desaturation Index.

  • BMI, body mass index; TIA, Transient Ischaemic Attack.