Comparison of oximetry–capnometry measurements prior to discharge following automated AVAPS setup and protocolised fixed-level PS setup
| AVAPS | Fixed-level PS | p Value | |
| 4% ODI (events/h) | 22±16 | 22±17 | 0.517 |
| Mean SpO2 (%) | 92±3 | 92±3 | 0.552 |
| %TST <90% (%) | 20±21 | 15±20 | 0.630 |
| Mean tcCO2 (kPa) | 7.1±0.7 | 7.2±1 | 0.952 |
| Max tcCO2 (kPa) | 8.4±0.8 | 8.4±1.6 | 0.980 |
The p value refers to comparison between interventions by independent t test.
AVAPS, average-volume-assured pressure support; % ODI, 4% oxygen desaturation index; PS, pressure support; SpO2, oxygen saturation of haemoglobin; tcCO2, transcutaneous carbon dioxide; %TST <90%, % total sleep time with SpO2 under 90%.