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Demographics and Actigraphy (Mean and Standard Deviation)
| Group | Age | N (# female) | Education (years) | Epworth | TST (minutes) | Bedtime | Waketime |
|---|---|---|---|---|---|---|---|
| Nap | 23.6 (.78) | 19 (12) | 15.1 (.40) | 5.81 (.58) | 417 (54) | 23:56 | 7:42 |
| Placebo | 22.2 (.84) | 21 (15) | 14.8 (.38) | 6.05 (.67) | 428 (45) | 00:05 | 8:02 |
| Caffeine | 25.5 (1.2) | 21 (15) | 15.5 (.27) | 6.37 (.62) | 401 (76) | 23:36 | 7:38 |
