Sleep architecture and the duration of stage 2 non-REM sleep and REM sleep on the two study nights
| High humidity | Low humidity | p value | |
|---|---|---|---|
| Wakefulness (%TRT) | 17.5 (2.5) | 17.1 (2.6) | 0.90 |
| Stage 1 (%TST) | 8.3 (1.3) | 6.6 (1.0) | 0.27 |
| Stage 2 (%TST) | 50.0 (2.5) | 48.2 (2.0) | 0.64 |
| Slow wave sleep (%TST) | 18.2 (2.6) | 19.5 (2.4) | 0.47 |
| REM sleep (%TST) | 23.5 (1.6) | 26.6 (1.9) | 0.30 |
| Total sleep time (min) | 349 (15.2) | 348 (14.5) | 0.98 |
| Sleep efficiency (TST/TRT) | 80.6 (2.4) | 81.2 (2.6) | 0.82 |
| Stage 2 supine position (min) | 56 (9) | 67 (10) | 0.30 |
| Stage 2 lateral position (min) | 122 (10) | 106 (9) | 0.20 |
| REM lateral (min) | 68 (7) | 70 (6) | 0.82 |
TRT = total recording time; TST = total sleep time.