Respiratory event types and proportion from the baseline sleep studies (prerandomisation, n=332)
| OSA severity | Proportion of events (%) | |||
| Hypopnoea | Apnoea | |||
| Central | Obstructive | Mixed | ||
| AHI <10 | 94.5 | 2.6 | 2.5 | 0.05 |
| AHI 10–30 | 82.7 | 3.7 | 13.3 | 0.3 |
| AHI >30 | 52.2 | 4.8 | 39.4 | 3.6 |
| All AHI | 83.4 | 3.2 | 11.8 | 1.5 |
AHI, apnoea hypopnoea index; OSA, obstructive sleep apnoea.