Patient perceptions of the two treatment arms, active continuous positive airway pressure (CPAP) and sham CPAP, at the exit interview (n=30)
| True CPAP (%) | Sham CPAP (%) | Unsure/ equal (%) | Don't know/ no bed partner (%) | |
|---|---|---|---|---|
| Overall preference | 19 (63) | 8 (27) | 3 (10) | – |
| Led to better sleep | 19 (64) | 7 (23) | 4 (13) | – |
| Preferred for long term use | 20 (67) | 8 (27) | 2 (6) | – |
| Presumed bed partner preference | 12 (40) | 5 (17) | 8 (27) | 5 (17) |
Active CPAP was consistently identified as the preferred treatment before disclosure of the presence of a placebo had occurred.