Sleep characteristics
| SDB | No SDB | p-value | |
| Subjects n | 29 | 25 | |
| AHI events·h−1 | 30 (21–40) | 5 (3–7) | <0.001 |
| Central AHI events·h−1 | 8 (5–22) | 1 (0–3) | 0.001 |
| Oxygen desaturation index events·h−1 | 21 (12–31) | 4 (2–6) | <0.001 |
| Minimum oxygen saturation % | 83±7 | 87±4 | 0.010 |
| Sleep efficiency % | 72±13 | 70±16 | 0.605 |
| N3 % | 14±8 | 17±8 | 0.137 |
| REM sleep % | 14±6 | 18±8 | 0.047 |
Data are presented as median (interquartile range) or mean±sd, unless otherwise stated. SDB: sleep disordered breathing; AHI: apnoea–hypopnoea index; N3: slow wave sleep; REM: rapid eye movement.