Table 2 Objective sleep characteristics measured by actigraphy (Time 1)
Week night | Weekend night | |||||||
|---|---|---|---|---|---|---|---|---|
Mean | SD | 95% Confidence interval | Mean | SD | 95% Confidence interval | |||
Lower bound | Upper bound | Lower bound | Upper bound | |||||
Bed time | ||||||||
Girl | 22:43 | 1:10 | 22:23 | 23:03 | 23:24 | 1:14 | 23:04 | 23:46 |
Boy | 23:05 | 1:18 | 22:24 | 23:45 | 23:38 | 1:16 | 22:46 | 24:05 |
Total | 0.95 | 1:12 | 22:31 | 23:06 | 23:25 | 1:14 | 23:07 | 23:43 |
Wake up time | ||||||||
Girl | 7:16 | 0:47 | 7:03 | 7:31 | 8:16 | 1:02 | 7:59 | 8:34 |
Boy | 7:19 | 0:43 | 6:54 | 7:39 | 8:12 | 0:52 | 7:46 | 8:39 |
Total | 7:17 | 0:46 | 7:05 | 7:28 | 8:15 | 1:00 | 8:01 | 8:30 |
Sleep duration | ||||||||
Girl | 513.90 | 50.06 | 499.67 | 528.13 | 527.56 | 71.38 | 507.48 | 547.63 |
Boy | 491.80 | 68.99 | 456.33 | 527.27 | 526.95 | 61.00 | 495.59 | 558.31 |
Total | 508.29 | 55.75 | 494.69 | 521.89 | 527.40 | 68.49 | 510.83 | 543.98 |
Sleep efficiency | ||||||||
Girl | 84.41 | 3.68 | 83.36 | 85.45 | 84.66 | 4.49 | 83.40 | 85.92 |
Boy | 84.09 | 5.65 | 81.18 | 86.99 | 82.88 | 6.64 | 79.46 | 86.29 |
Total | 84.33 | 4.22 | 83.30 | 85.36 | 84.22 | 5.12 | 82.98 | 85.45 |