Table 2.
Sleep parameters, vigilance, and subjective drowsiness after LE in the three conditions
| DLa | OLEDb | LEDc | p | Post hoc analysis | |
|---|---|---|---|---|---|
| Polysomnography | |||||
| Total sleep time, min | 319.8±25.3 | 327.3±18.9 | 328.5±15.1 | 0.204 | |
| Sleep latency, min | 3.4±3.2 | 4.2±5.5 | 3.8±3.0 | 0.639 | |
| Sleep efficiency, % | 93.9±3.5 | 94.1±3.9 | 94.1±3.9 | 0.882 | |
| WASO, % | 5.2±3.3 | 4.7±3.4 | 5.0±2.9 | 0.929 | |
| Stage N1, % | 10.2±4.9 | 10.2±6.9 | 10.4±5.8 | 0.453 | |
| Stage N2, % | 51.1±8.3 | 50.4±8.2 | 53.8±6.5 | 0.023* | b<c |
| Stage N3, % | 14.6±9.2 | 16.0±10.7 | 12.9±9.2 | 0.013* | b>c |
| REM sleep, % | 24.1±5.8 | 23.4±6.1 | 22.9±4.8 | 0.576* | |
| Total AI, /h | 12.6±5.1 | 12.2±5.9 | 12.7±5.0 | 0.384 | |
| Spontaneous AI, /h | 7.9±4.3 | 8.6±5.5 | 8.7±4.6 | 0.742 | |
| Psychomotor vigilance test | |||||
| Number of lapses | 3.5±3.9 | 3.0±3.5 | 3.7±3.4 | 0.529 | |
| 1/response time, /s | 4.3±0.5 | 4.3±0.6 | 4.3±0.6 | 0.883* | |
| Errors | 1.1±1.4 | 1.3±0.9 | 0.9±1.2 | 0.402 | |
| Subjective drowsiness | |||||
| SSS | 2.5±0.7 | 2.5±1.0 | 2.3±0.8 | 0.524 |
Data are mean±standard-deviation values. Analyzed by Friedman test.
*
analyzed by Repeated-measures ANOVA.
WASO: waking after sleep onset, REM: rapid eye movement, AI: arousal index, SSS: Stanford Sleepiness Scale