Table 3.
Sleep measurements.
Parameters | Treatment | Values * | ||
---|---|---|---|---|
Week 0 | Week 24 | Changes | ||
Total N3 stage (min) | CP2305 | 41.6 ± 5.0 | 46.1 ± 5.3 | 4.5 ± 3.4 |
Placebo | 43.9 ± 4.9 | 46.1 ± 5.2 | 2.2 ± 3.3 | |
Total REM sleep time (min) | CP2305 | 93.4 ± 5.7 | 84.8 ± 5.7 | −8.5 ± 5.5 |
Placebo | 79.4 ± 5.6 | 81.8 ± 5.6 | 2.4 ± 5.4 | |
Delta power in total sleep period time (μV2) | CP2305 | 520,644 ± 61,030 | 483,302 ± 54,273 | −37,342 ± 25,529 |
Placebo | 482,451 ± 59,889 | 456,930 ± 53,259 | −25,522 ± 25,052 | |
Delta power ratio (%) †,‡ | CP2305 | 37.2 ± 2.7 | 50.4 ± 2.9 | 13.2 ± 2.9 |
Placebo | 41.2 ± 2.6 | 44.4 ± 2.9 | 3.2 ± 2.8 | |
Sleep latency of first N3 stage (min) † | CP2305 | 23.7 ± 3.6 | 17.6 ± 5.6 | −6.0 ± 5.4 |
Placebo | 22.0 ± 3.5 | 26.3 ± 5.5 | 4.3 ± 5.3 | |
Wake time after sleep onset (min) † | CP2305 | 22.7 ± 2.1 | 18.4 ± 2.1 | −4.2 ± 2.0 |
Placebo | 22.7 ± 1.0 | 21.8 ± 2.1 | −0.9 ± 1.9 |
* Data are presented as the mean ± SEM. † Significant differences between CP2305 and placebo group (p < 0.05) by analysis of covariance (ANCOVA) with each initial value as a covariate. Partial eta squared values of delta power ratio, sleep latency of first N3 stage, and wake time after sleep onset are 0.099, 0.085, and 0.120, respectively. ‡ Delta power ratio is representative of the delta power in the first sleep cycle relative to the delta power in the total sleep period. Abbreviations: REM, rapid eye movement; N3, non-REM sleep stage 3.