Table 2.
Mean and change in mean subjective sleep parameters.
| SZRT group (n = 45) | Placebo group (n = 45) | P valuea | |||
|---|---|---|---|---|---|
| Mean (SD) | Change | Mean (SD) | Change | ||
| PSQI | |||||
| Total scores | |||||
| Baseline | 11.6 (3.6) | 11.5 (2.5) | |||
| 4-week posttreatment | 7.8 (3.7) | −3.8 | 9.6 (3.1) | −1.9 | 0.007∗ |
| Sleep diary | |||||
| Total time in bed | |||||
| Baseline | 446.6 (104.2) | 489.8 (111.5) | |||
| 4-week posttreatment | 466.3 (78.8) | 24.1 | 481.7 (113.6) | −5.5 | 0.261 |
| Mean TST | |||||
| Baseline | 342.6 (95.2) | 377.0 (101.1) | |||
| 4-week posttreatment | 412.8 (81.3) | 70.2 | 418.8 (121.9) | 41.8 | 0.228 |
| Mean SL | |||||
| Baseline | 41.5 (36.7) | 38.8 (18.9) | |||
| 4-week posttreatment | 26.5 (18.3) | −15.0 | 31.8 (31.5) | −6.9 | 0.211 |
| Mean SE (%) | |||||
| Baseline | 76.5 (11.3) | 79.0 (11.1) | |||
| 4-week posttreatment | 87.9 (9.0) | 11.4 | 84.1 (15.4) | 5.0 | 0.017∗ |
aDifference between mean change scores SZRT and placebo groups (t-test). TST, total sleep time; SL, sleep latency; SE, sleep efficiency.
∗ P < 0.05.