| Characteristics | CPAP | Sham | p-value |
| AHI events·h−1 | 6.9±11.1 | 38.7±28.7 | <0.00001 |
| ODI events·h−1 | 5±8.4 | 38.1±23.4 | <0.00001 |
| TST wih Sa,O2 <90% % | 0.8±2.1 | 10.1±12.0 | 0.0005 |
| Minimum Sa,O2 % | 89.5±7.1 | 79.5±8.9 | 0.0001 |
| Treatment compliance h·night−1 | 4.6±2.0 | 3.4±2.2 | 0.003 |
| ESS score | 7.7±4.4 | 9.4±4.2 | 0.02 |
Data are presented as mean±sd,unless otherwise stated. CPAP: continuous positive airway pressure; AHI: apnoea–hypopnoea index; ODI: oxygen desaturation index; TST: total sleep time; Sa,O2: arterial oxygen saturation; ESS: Epworth Sleepiness Scale.