Table 2.
Comparison of Polysomnogram Values by Group and Time
| Variables Mean (SD) | Active CPAP n=12 | Sham-CPAP n=11 | p-value |
|---|---|---|---|
| Baseline Polysomnogram | |||
| Sleep latency (minutes) | 16.92 (29.6) | 15.91 (14.1) | .919 |
| Total sleep time (minutes) | 436 (58) | 494 (58) | .026 |
| Sleep efficiency (%) | 76.9 (15.5) | 80.7 (8.3) | .484 |
| Wake after sleep onset (minutes) | 88.50 (60.8) | 82.55 (39.1) | .785 |
| AHI (all body positions) | 50.17 (31) | 26.64 (11) | .027 |
| Oxygen Desaturation Index (decrease ≥ 4%) | 42 (30) | 19 (9) | .024 |
| Periodic Leg Movement Index | 1.25 (2.3) | 2.36 (3.6) | .381 |
| CPAP Titration vs. sham-CPAP Titration Polysomnogram | |||
| Sleep latency (minutes) | 14.58 (13.9) | 23.64 (24.8) | .287 |
| Total sleep time (minutes) | 444 (68) | 458 (53) | .587 |
| Sleep efficiency (%) | 79.4 (11.6) | 69.18 (12.8) | .058 |
| Wake after sleep onset (minutes) | 80.50 (48.3) | 126.18 (54.1) | .044 |
| AHI (all body positions) | 6.92 (6.2) | 21.27 (14.5) | .005 |
| Oxygen Desaturation Index (decrease ≥ 4%) | 4.67 (5.5) | 14.73 (8.5) | .004 |
| Periodic Leg Movement Index | 1.25 (1.4) | 4.45 (5.0) | .064 |