Table 2.
Percentage of baseline days on which participants engaged in sleep hygiene recommendations, in the full sample and by college enrollment (n = 56; 477 reports).
| Recommendation | Full Sample (n = 56), M (SD) | College (n = 41), M (SD) | Noncollege (n = 15), M (SD) |
|---|---|---|---|
| 1. Wake up within same 30-min window | 48.7 (20.0) | 47.7 (19.2) | 51.4 (22.2) |
| 2. Limit naps to 30 min | 80.5 (21.7) | 79.2 (23.0) | 84.1 (18.0) |
| 3. Engage in relaxing bedtime routine | 42.1 (33.7) | 39.1 (34.1) | 50.4 (32.0) |
| 4. Avoid bright light before bedtime | 42.2 (34.4) | 40.3 (34.4) | 47.5 (35.1) |
| 5. Engage in 30+ min aerobic activity* | 21.6 (20.9) | 21.3 (21.5) | 22.2 (20.0) |
| 6. Avoid nicotine within 2 h of bedtime | 96.5 (12.9) | 98.7 (4.9) | 90.3 (23.0) |
| 7. Avoid alcohol within 2 h of bedtime | 80.8 (16.9) | 81.5 (17.5) | 78.9 (15.3) |
| 8. Avoid caffeine after 12 PM | 52.2 (33.4) | 50.5 (31.0) | 56.9 (40.0) |
| 9. Limit caffeine to 3 (8 oz) doses | 92.5 (16.8) | 94.0 (15.4) | 88.3 (20.1) |
| 10. Avoid heavy meals within 2 h of bedtime | 78.2 (19.3) | 76.2 (21.2) | 83.7 (11.9) |
| 11. Create comfortable sleep environment | 60.8 (33.3) | 61.5 (33.0) | 59.0 (35.0) |
*Defined as at least moderate-intensity aerobic activity. M = mean. SD = standard deviation.