Table 1.
Variable | Parent | Actigraphy | Diary | Survey | ||||||
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X | X | Diff (±se) | P* | X | Diff (±se) | P* | X | Diff (±se) | P* | |
School night | ||||||||||
Sleep period | 8 h 51 m | 8 h 06 m† | 45 m (2.92) | <0.001 | 8 h 16 m | 35 m (3.13) | <0.001 | 8 h 10 m | 41 m (4.26) | <0.001 |
Bedtime | 10:09 pm | – | – | – | 10:28 pm | −18 m (0.04) | <0.001 | 10:24 pm | −14 m (0.04) | <0.001 |
Wake time | 6:57 am | 7:03 am | −6 m (0.04) | ns | 7:07 am | −10 m (0.03) | <0.001 | 6:54 am | −3 m (0.02) | ns |
Weekends | ||||||||||
Sleep period | 10 h 01 m | 8 h 29 m† | 1 h 32 m (6.17) | <0.001 | 8 h 41 m | 1 h 21 m (6.09) | <0.001 | 9 h 21 m | 40 m (6.72) | <0.001 |
Bedtime | 11:20 pm | – | – | – | 11:38 pm | −18 m (0.07) | <0.001 | 11:54 am | −35 m (0.07) | <0.001 |
Wake time | 9:16 am | 8:26 am | 51 m (0.09) | <0.001 | 8:30 am | 47 m (0.08) | <0.001 | 9:22 am | 6 m (0.08) | ns |
Notes:
Actigraphic sleep period was calculated as the time elapsed from sleep onset to sleep offset;
bonferroni adjustment used to adjust for multiple comparisons.