Table 2.
Sleep Variables during screening and during first night of CPAP vs. Placebo CPAP
| Sleep Variable (mean ± SD) |
Therapeutic CPAP Group (n=27) |
Placebo CPAP Group (n=25) |
p value* | ||
|---|---|---|---|---|---|
| Screening** | First night CPAP | Screening** | First night PLACEBO | ||
| TST (min) | 366.9 ± 91.9 | 308.0 ± 71.0 | 382.7 ± 93.9 | 310.5 ± 63.9 | 0.84 |
| WASO (min) | 117.6 ± 74.0 | 89.1 ± 40.7 | 130.4 ± 73.3 | 110.7 ± 58.3 | 0.51 |
| % Stage 1 Sleep | 22.9 ± 14.0 | 15.5 ± 8.4 | 22.0 ± 14.2 | 23.5 ± 14.6 | 0.04 |
| % Stage 2 Sleep | 59.5 ± 11.6 | 67.7 ± 11.5 | 62.3 ± 16.6 | 57.3 ± 12.2 | 0.02 |
| % Stage 3 Sleep | 2.4 ± 4.2 | 3.9 ± 6.1 | 1.8 ± 2.3 | 3.3 ± 4.5 | 0.73 |
| % Stage 4 Sleep | 0.1 ± 0.3 | 0.1 ± 0.4 | 0.0 ± 0.1 | 0.0 ± 0.0 | 0.28 |
| % REM Sleep | 15.1 ± 8.9 | 12.8 ± 8.2 | 13.9 ± 8.4 | 14.9 ± 7.6 | 0.43 |
| TIB (min) | 494.4 + 75.5 | 436.6 + 45.2 | 519.3 + 3 | 444.0 + 50.3 | 0.85 |
| SP (min) | 484.5 + 77.5 | 397.2 + 63.5 | 513.2 + 83.8 | 421.1 + 57.8 | 0.82 |
| SO (min) | 9.9 + 20.2 | 39.4 + 48.8 | 6.2 + 8.0 | 23.2 + 39.4 | 0.24 |
| SE (%) | 75.9 + 14.2 | 77.2 + 10.8 | 74.7 + 13.2 | 74.1 + 12.8 | 0.39 |
| ArI | 8.8 ± 5.5 | 5.9 ± 3.5 | 7.9 ± 4.4 | 9.6 ± 5.6 | 0.23 |
*
p-value from randomized analysis is shown.
**
Note: There were no significant differences between the two groups on any of these variables on the screening night.