Polysomnographic variables for study subjects (n = 9)
| Variable | Time of data collection; mean (and standard deviation) | ||
|---|---|---|---|
| Baseline | Week 4 | Week 8 | |
| Total sleep time, min | 365.0 (72.8) | 390.7 (110.0) | 397.9 (42.4) |
| Sleep latency, min | 39.9 (32.7) | 23.9 (38.0) | 16.6* (15.3) |
| REM latency, min | 98.9 (86.6) | 85.7 (59.3) | 48.1 (23.2) |
| Sleep efficiency, % | 78.8 (14.6) | 85.3 (17.2) | 91.5* (5.5) |
| Time awake, % | 13.1 (13.2) | 10.2 (13.2) | 5.5 (5.3) |
| Stage of sleep, % | |||
| 1 | 4.9 (1.9) | 3.4* (2.2) | 3.4* (2.6) |
| 2 | 49.2 (11.2) | 52.4 (13.4) | 50.9 (5.3) |
| 3 | 8.7 (3.5) | 8.4 (5.1) | 9.1 (6.0) |
| 4 | 4.1 (4.1) | 4.3 (4.9) | 6.0 (5.1) |
| Slow-wave (deep) sleep, % | 12.9 (5.9) | 12.6 (9.2) | 15.1 (9.2) |
| REM sleep, % | 18.8 (5.6) | 19.5 (4.3) | 23.6 (6.1) |
| Periodic leg movement index | 6.1 (5.9) | 2.6 (3.6) | 2.2 (1.4) |
| Arousal index | 8.2 (3.6) | 11.2 (6.6) | 12.2 (7.1) |
Note: REM = rapid eye movement.
↵* Paired t test, compared with baseline, p < 0.05.