| AVAPS (n=22) | ST (n=21) | |
| Age (years) | 54±9 | 56±12 |
| Gender (%male) | 50 | 57 |
| BMI (kg/m2) | 48±7 | 51±7 |
| ESS (/24) | 11±6 | 14±6 |
| Baseline PaCO2 (kPa) | 6.93±0.77 | 6.77±0.85 |
| Baseline PaO2 (kPa) | 9.08±1.14 | 8.72±1.91 |
| Mean delivered Ipap | 23±5 | 23±4 |
| 4%ODI | 23±17 | 20±15 |
| Mean nocturnal SpO2 | 92±3 | 92±4 |
| Mean tcCO2 | 7.0±0.6 | 7.2±1.1 |
| ∆PaCO2 (kPa) | −0.63±1.1 | −0.55±1.2 |
| ∆PaO2 (kPa) | 0.1±1.3 | 0.7±1.4 |