| Items | Duration of night-time sleep (min) N = 25 | Actual night-time sleep duration (min) N = 25 | |||||||||
| Short 1) <360 min (N = 5) | Optimal 2) 360 - 480 min (N = 7) | Long 3) >480 min (N = 13) | χ2 | p value | Shoort 1) <360 min (N = 7) | Optimal 2) 360 - 480 min (N = 13) | Long 3) >480 min (N = 5) | χ2 | p value | Multiple comarison | |
| Median | Median | Median | Median | Median | Median | ||||||
| Total daytime nap duration (min) | 99.0 | 54.0 | 37.0 | 2.3 | 0.31 | 121.0 | 15.0 | 69.0 | 10.1 | 0.01 | 1) > 2) χ2 = 8.2, p = 0.016 |
| Percent nap duration in the daytime (%) | 9.5 | 5.3 | 3.9 | 2.0 | 0.37 | 12.6 | 1.5 | 8.4 | 9.6 | 0.01 | 1) > 2) χ2 = 7.4, p = 0.025 |
| Longest daytime nap duration (min) | 35.0 | 31.0 | 17.0 | 4.0 | 0.13 | 35.0 | 7.0 | 28.0 | 8.0 | 0.02 | 1) > 2) χ2 = 7.1, p = 0.028 |
| Daytime activity Index (%) | 90.0 | 94.5 | 95.8 | 1.9 | 0.38 | 89.5 | 96.2 | 87.5 | 7.5 | 0.02 | 1) < 2) χ2 = 6.4, p = 0.042 |
| Mean daytime activity index (count/min) | 181.7 | 168.0 | 192.0 | 4.0 | 0.14 | 159.5 | 200.6 | 188.7 | 4.7 | 0.09 | |