Table 1.
Mean Sleep Characteristics of the 2 Nights of the 2 Experimental Sessionsa
| 10 h in Bed | 4 h in Bed | P Valueb | |
|---|---|---|---|
| TST, min | 536 (514; 546) | 226 (225; 230) | .0002 |
| Sleep latency, min | 24 (22; 37) | 12 (8; 15) | .001 |
| Sleep efficiency, % | 89 (86; 91) | 94 (92; 95) | .06 |
| Sleep maintenance, % | 94 (94; 97) | 99 (98; 99) | .02 |
| Time spent in sleep stages, min | |||
| WASO | 28 (14; 33) | 3 (2; 4) | .0002 |
| Light non-REM | 329 (278; 358) | 118 (69; 146) | .0002 |
| SWS | 82 (33; 90) | 65 (43; 120) | .72 |
| REM | 138 (118; 155) | 35 (30; 48) | .0002 |
a
Light non-REM indicates the lighter stages of non-REM sleep (ie, stages N1 + N2). SWS is the deepest stage of non-REM sleep (ie, stage N3).
b
P values are from the Wilcoxon exact rank test.