Table 1.
Sleep Architecture.
| Parameter Minutes of Recording Time |
Habitual Sleep | Simulated Early Morning Shiftwork | p Value |
|---|---|---|---|
| Stage 1 | 16.3 ± 1.7 | 15.2 ± 1.6 | 0.63 |
| Stage 2 | 235.4 ± 5.0 | 182.3 ± 8.9 | p < 0.0001 |
| Stage 3/4 (SWS) | 76.9 ± 6.9 | 84.8 ± 7.9 | 0.11 |
| REM | 107.3 ± 4.6 | 68.4 ± 3.6 | p < 0.0001 |
| Total Sleep Time (TST) | 435.8 ± 5.8 | 350.7 ± 6.0 | p < 0.0001 |
| Sleep Efficiency (SE) | 90.8 ± 1.2 | 88.7 ± 1.0 | 0.14 |
| SOL 1.5 min | 16.3 ± 3.3 | 16.4 ± 2.6 | 0.97 |
| SOL 10 min | 17.9 ± 3.3 | 19.2 ± 2.8 | 0.77 |
| WASO from SOL 1.5 min | 27.9 ± 4.1 | 28.3 ± 4.3 | 0.94 |
| REML from SOL 1.5 min | 109.7 ± 9.6 | 95.5 ± 9.0 | 0.33 |
| SWSL from SOL 1.5 min | 15.2 ± 1.5 | 14.0 ± 1.7 | 0.39 |
| Number of Awakenings | 21.4 ± 2.0 | 19.1 ± 1.9 | 0.24 |
| Avg Duration of Awakenings | 1.3 ± 0.2 | 1.5 ± 0.2 | 0.54 |
Data are presented as the mean ± SEM. Abbreviations are designated as follows: slow wave sleep (SWS); rapid eye movement (REM); sleep onset latency (SOL); wakefulness after sleep onset (WASO); latency to REM Sleep (REML); latency to SWS (SWSL).