Table 2.
Means (± SD) for 8-h PSG obtained from day workers (during night sleep), night workers, and SWSD patients (during day sleep)
| Day Workers | Night Workers | SWSD | P-value | ||
|---|---|---|---|---|---|
| TIB (h) | 8.0 ± 0.02 | 8.0 ± 0.02 | 7.9 ± 0.11 | ns | |
| TST (h) | 7.2 ± 0.40 | 7.0 ± 0.50 | 5.96 ± 1.56 | 0.04 | |
| SE (%) | 89.9 ± 4.87 | 88.6 ± 6.71 | 75.0 ± 19.10 | 0.04 | |
| SOL (min) | 17.0 ± 18.82 | 6.2 ± 3.49 | 15.0 ± 9.7 | ns | |
| WASO (min) | 30.3 ± 21.07 | 48.9 ± 30.79 | 107.0 ± 91.58 | 0.03 | |
| Stage 1 (%) | 5.4 ± 5.62 | 4.3 ± 1.86 | 5.0 ± 3.63 | ns | |
| Stage 2 (%) | 57.1 ± 4.65 | 62.0 ± 7.38 | 61.0 ± 9.85 | ns | |
| Stage 3 (%) | 16.4 ± 5.54 | 10.7 ± 9.39 | 11.0 ± 11.40 | ns | |
| REM (%) | 21.0 ± 4.99 | 22.9 ± 4.06 | 22.0 ± 2.38 | ns |