Table 1.
Polysomnographic measures.
| Variables |
BSL |
REC |
t(1,38) | p | ||
|---|---|---|---|---|---|---|
| Mean | SD | Mean | SD | |||
| Stage 1 latency (min) | 6.73 | 5.81 | 1.93 | 2.09 | 5.8 | 0.0001 |
| Stage 2 latency (min) | 11.40 | 11.46 | 3.27 | 2.37 | 4.8 | 0.0001 |
| Stage 1 (%) | 6.36 | 2.94 | 2.85 | 1.71 | 8.84 | 0.0001 |
| Stage 2 (%) | 59.25 | 6.76 | 58.65 | 8.48 | 0.6 | 0.55 |
| Stage 3 (%) | 7.75 | 3.77 | 11.87 | 3.89 | 7.73 | 0.0001 |
| Stage 4 (%) | 2.21 | 3.27 | 5.89 | 6.01 | 6.32 | 0.0001 |
| SWS (%) | 9.96 | 6.06 | 17.76 | 7.71 | 11.94 | 0.0001 |
| REM (%) | 24.42 | 4.42 | 20.74 | 5.73 | 4.15 | 0.0002 |
| WASO (min) | 26.44 | 19.30 | 11.69 | 7.66 | 4.96 | 0.0001 |
| Awakenings (#) | 28.67 | 10.74 | 20.51 | 7.61 | 5.61 | 0.0001 |
| Arousals (#) | 35.54 | 17.79 | 26.18 | 18.74 | 3.16 | 0.003 |
| TST (min) | 440.90 | 39.03 | 449.30 | 20.27 | 1.49 | 0.14 |
| TBT (min) | 476.98 | 40.69 | 463.61 | 21.98 | 2.21 | 0.03 |
| SEI % (TST/TBT) | 92.51 | 4.21 | 96.92 | 1.72 | 6.51 | 0.0001 |
Means and standard deviations (SD) of the PSG variables, during baseline (BSL) and recovery (REC) nights in 39 subjects. The results of paired t-tests are also reported. SWS, slow-wave sleep; REM, rapid eye movement; WASO, wake after sleep onset; TST, total sleep time; TBT, total bed time; SEI, sleep efficiency index. Significant results (p < 0.05) were reported in bold.