Table 1.
Sleep parameters
| Nocturnal sleep | Daytime sleep | t | |
|---|---|---|---|
| Total sleep time, min | 418.9 ± 7.23 | 425.9 ± 14.24 | −0.44 |
| Sleep onset, min | 14.5 ± 3.53 | 6.6 ± 2.11 | 1.93 |
| Sleep efficiency, % | 93.77 ± 1.62 | 91.43 ± 2.94 | 0.70 |
| REM latency, min | 90.4 ± 13.38 | 74.8 ± 5.24 | 1.09 |
| Wake time, min (%) | 11.4 ± 5.40 (2.62 ± 1.24) | 26.6 ± 13.59 (5.85 ± 2.95) | −1.04 |
| Stage 1 sleep, min (%) | 22.1 ± 2.96 (5.08 ± 0.65) | 44.1 ± 11.75 (9.79 ± 2.59) | −1.82 |
| Stage 2 sleep, min (%) | 249.3 ± 8.64 (58.01 ± 2.08) | 203.5 ± 11.49 (44.92 ± 2.35) | 3.19* |
| SWS, min (%) | 73.8 ± 8.48 (17.18 ± 2.0) | 83.2 ± 10.22 (18.41 ± 2.25) | −0.71 |
| REM sleep, min (%) | 73.7 ± 6.13 (17.10 ± 1.33) | 95.2 ± 9.22 (21.01 ± 1.99) | −1.94 |
Sleep during 8-h retention intervals placed during nighttime and daytime. Mean (± SEM) total sleep time, time to sleep onset (after lights off), sleep efficiency (% of total 8-h period not spent awake), latency to first REM sleep period (with reference to sleep onset), wake time, and time spent in stage 1 sleep, stage 2 sleep, SWS, and REM sleep are shown. Time in sleep stages is indicated in min and % of total sleep time. Right column indicates t values for statistical comparisons between the two conditions.
*
, P < 0.05.