| Males | 30 (88) |
| Age yrs | 53±8.8 (29–68) |
| BMI kg·m−2 | 33±5.9 (24–55) |
| Height cm | 175±7.4 (160–194) |
| Weight kg | 100±16.3 (62–152) |
| AHI at diagnosis# events·h−1 | 54.3±27.4 (10–105) |
| Current PAP cmH2O | 12±2.7 (8–18) |
| Time using PAP months | 44±45.7 (6–159) |
| Patients using conventional CPAP therapy | 26 (76) |
Data are presented as n (%) or mean±sd (range). BMI: body mass index; AHI: apnoea/hypopnoea index; PAP: positive airway pressure; CPAP: continuous positive airway pressure. #: based on results of the patients’ original diagnostic polysomnography; data available for 32 out of 34 patients.