Continuous positive airway pressure usage at 3, 6 and 12 months
| 3 months | 6 months | 12 months | ||||
| n | Mean±sd (range) | n | Mean±sd (range) | n | Mean±sd (range) | |
| Pressure 95th centile cmH2O | 57 | 10.9±3.6 (4–19.3) | 48 | 11.6±3.6 (4.6–19.2) | 42 | 11.5±3.6 (4.0–18.2) |
| AHI events·h−1 | 57 | 1.9±2.7 (0–10) | 48 | 1.9±2.5 (0–11.8) | 42 | 1.7±2.3 (0–8.4) |
| Obstructive events·h−1 | 57 | 0.78±1.44 (0–8.3) | 48 | 0.65±1.11 (0–6.2) | 42 | 0.54±0.79 (0–3.1) |
| Central events·h−1 | 57 | 0.84±1.66 (0–8.5) | 48 | 0.75 91.34 (0–6.2) | 42 | 0.70±1.37 (0–6.5) |
| Median daily usageh | 57 | 3.33±2.25 (0–7.93) | 57 | 3.19±2.54 (0–8.07) | 57 | 3.21±2.70 (0–7.98) |
| Average daily usage h | 57 | 2.35±2.09 (0–7.48) | 57 | 2.16±2.30 (0–6.9) | 57 | 1.78±2.18 (0–6.53) |
AHI: apnoea–hypopnoea index.