Table 1.
Weekday sleep characteristics of 621 Chinese adolescents aged 11–20 years based on sleep diary by age and gender.
| Age (years)/ gender |
Median age (years) |
Bedtime |
Sleep latency (mins) |
Wake-up time |
TST * (hour) |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| n | Median (IQR†) |
10th | 90th | Median (IQR†) |
10th | 90th | Median (IQR†) |
10th | 90th | Median (IQR†) |
10th | 90th | ||
| Male | ||||||||||||||
| 11–12 | 12.6 | 18 | 21:12 (49) | 19:35 | 22:00 | 15.5 (13.0) | 2.6 | 58.0 | 6:28 (55) | 6:00 | 7:35 | 9.2 (1.5) | 8.3 | 11.0 |
| 13- | 13.4 | 32 | 20:58 (61) | 19:45 | 21:36 | 12.5 (9.0) | 7.5 | 24.0 | 6:08 (30) | 5:53 | 6:40 | 9.0 (1.1) | 8.3 | 11.0 |
| 14- | 14.4 | 81 | 21:07 (56) | 19:50 | 21:50 | 13.3 (10.0) | 5.0 | 34.8 | 5:48 (34) | 5:10 | 7:00 | 8.6 (1.0) | 7.7 | 10.2 |
| 15- | 15.4 | 76 | 21:30 (59) | 20:10 | 22:45 | 17.5 (17.5) | 7.5 | 32.0 | 6:00 (38) | 5:30 | 6:45 | 8.2 (1.4) | 7.0 | 9.8 |
| 16- | 16.4 | 45 | 22:00 (78) | 21:00 | 23:30 | 13.3 (10.0) | 5.0 | 30.0 | 6:24 (56) | 5:42 | 7:36 | 8.2 (2.0) | 6.1 | 9.8 |
| 17- | 17.5 | 25 | 22:30 (67) | 21:12 | 23:30 | 13.0 (10.0) | 5.0 | 30.0 | 7:06 (108) | 5:30 | 8:42 | 8.3 (2.7) | 5.9 | 11.3 |
| 18–20 | 19.0 | 64 | 22:00 (118) | 20:36 | 23:48 | 23.8 (20.5) | 8.0 | 56.0 | 8:00 (92) | 6:20 | 9:30 | 9.4 (2.9) | 7.1 | 11.8 |
| Female | ||||||||||||||
| 11–12 | 12.2 | 13 | 20:25 (88) | 19:43 | 21:30 | 10.0 (11.8) | 3.7 | 20.0 | 6:23 (53) | 5:30 | 7:00 | 9.8 (1.3) | 8.0 | 10.9 |
| 13- | 13.7 | 26 | 21:00 (62) | 19:30 | 22:30 | 10.0 (10.5) | 4.0 | 30.0 | 6:00 (60) | 5:00 | 7:00 | 8.9 (2.0) | 6.9 | 10.7 |
| 14- | 14.5 | 48 | 21:23 (75) | 20:12 | 22:30 | 10.0 (10.7) | 5.0 | 28.0 | 6:00 (36) | 5:30 | 7:06 | 8.6 (1.3) | 7.5 | 9.7 |
| 15- | 15.4 | 72 | 21:20 (60) | 20:30 | 22:48 | 11.6 (7.9) | 5.0 | 30.0 | 6:00 (49) | 5:30 | 7:18 | 8.3 (1.2) | 6.7 | 10.3 |
| 16- | 16.3 | 53 | 21:30 (60) | 20:30 | 22:38 | 18.3 (16.7) | 5.0 | 30.0 | 6:30 (120) | 5:30 | 8:15 | 8.8 (1.4) | 7.5 | 10.6 |
| 17- | 17.3 | 27 | 21:38 (94) | 20:36 | 23:18 | 14.0 (25.0) | 5.0 | 64.0 | 7:00 (110) | 5:48 | 8:22 | 9.1 (3.3) | 6.4 | 11.4 |
| 18–20 | 19.1 | 41 | 22:30 (64) | 21:43 | 24:00 | 17.5 (21.0) | 5.0 | 49.0 | 8:07 (90) | 6:36 | 10:00 | 9.2 (1.8) | 7.8 | 10.4 |
*
TST (Total Sleep Time) = wake-up time − bedtime − sleep latency.
†
IQR: Intraquartile range in minutes for bedtime and wake-up time and in hours for TST.