Table 3.
Polysomnography Means (SDs) by Treatment Phase
| Baseline
|
Posttreatment
|
1-yr Follow-up
|
||||
|---|---|---|---|---|---|---|
| M | SD | M | SD | M | SD | |
| Sleep Pattern Variables | ||||||
|
| ||||||
| SOL (min) | ||||||
| CBT | 18.6 | 12.3 | 12.0 | 6.7 | 18.1 | 15.0 |
| PL | 24.2 | 14.3 | 21.1 | 16.7 | 14.6 | 9.3 |
| MED | 16.1 | 9.3 | 25.2 | 22.1 | 12.7 | 9.9 |
| WASO (min) | ||||||
| CBT | 68.2 | 40.9 | 70.0 | 34.2 | 58.8 | 34.7 |
| PL | 60.1 | 36.2 | 67.4 | 31.1 | 68.0 | 51.3 |
| MED | 61.1 | 33.4 | 79.0 | 34.9 | 66.7 | 19.3 |
| TST (min) | ||||||
| CBT | 375.4 | 63.3 | 342.7 | 88.5 | 362.2 | 84.5 |
| PL | 399.1 | 64.3 | 391.7 | 48.8 | 379.5 | 67.4 |
| MED | 402.8 | 41.6 | 394.1 | 48.8 | 449.1 | 41.7 |
| SE (%) | ||||||
| CBT | 79.2 | 9.4 | 75.5 | 13.8 | 80.0 | 11.2 |
| PL | 80.5 | 11.0 | 77.4 | 9.3 | 80.1 | 12.2 |
| MED | 81.8 | 7.1 | 76.8 | 8.3 | 83.8 | 4.3 |
|
| ||||||
| Sleep Architecture Variables | ||||||
|
| ||||||
| L-Sleep (%) | ||||||
| CBT | 80.6 | 10.3 | 79.3 | 14.9 | 80.1 | 7.2 |
| PL | 79.9 | 7.5 | 78.0 | 7.8 | 78.4 | 10.5 |
| MED | 78.5 | 7.1 | 76.1 | 5.2 | 76.3 | 8.4 |
| D-Sleep (%) | ||||||
| CBT | 4.6 | 8.4 | 4.1 | 4.0 | 3.7 | 4.0 |
| PL | 2.6 | 3.4 | 4.5 | 5.1 | 5.6 | 3.9 |
| MED | 3.9 | 4.4 | 5.2 | 4.7 | 5.1 | 4.9 |
| REM (%) | ||||||
| CBT | 14.9 | 7.4 | 17.3 | 8.4 | 14.4 | 6.6 |
| PL | 19.8 | 6.3 | 18.4 | 6.9 | 15.3 | 8.3 |
| MED | 18.5 | 5.1 | 20.5 | 5.9 | 17.0 | 5.4 |
Treatment Groups = CBT, cognitive-behavior therapy; PL, placebo; MED, medication withdrawal only.
Variables = SOL, sleep onset latency; WASO, wake time after sleep onset; TST, total sleep time; SE, sleep efficiency percent; L-Sleep, light sleep; D-Sleep, deep sleep; REM, rapid eye movement sleep.