Characteristic sleep of participants presented as percentage
| Variables | n | Minimum | Maximum | Mean ± SD |
| Time to bed | 12,696 | 5.00 p.m. | 8.13 p.m. | 24.26±2.0 |
| Time wake up | 12,696 | 1.00 a.m. | 23.35 p.m. | 8.04±2.27 |
| PSQI score | 12,696 | 0 | 12 | 3.7±2.1 |
| Duration of sleep time | 12,696 | 0.30 h | 16 h | 7.4± 1.7 |
| Sleep efficiency | 12,696 | 22.9% | 100% | 95.4 ± 7.1 |
| Variables | n (%) | |||
| Sleep loss (h) | ||||
| <8 | 6,717 (52.9) | |||
| ⩾8 | 5,979 (47.1) | |||
| Daytime sleepiness | ||||
| Yes | 9,313 (73.4) | |||
| No | 3,383 (26.6) | |||
| Bad hygiene sleep | ||||
| Yes | 6,613 (52.1) | |||
| No | 6,083 (47.9) | |||
| Coffee or tea drink during the day | ||||
| No | 6,547 (51.6) | |||
| 1–5 | 6,137 (48.3) | |||
| >5 | 12 (0.1) | |||
| MP USE @NIGHT | ||||
| Yes | 3,542 (27.9) | |||
| No | 9,154 (72.1) | |||
| Variables | Minimum | Maximum | Mean ± SD | |
| Time to bed | 12,696 | 5.00 p.m. | 8.13 p.m. | 24.26±2.0 |
| Time wake up | 12,696 | 1.00 a.m. | 23.35 p.m. | 8.04±2.27 |
| PSQI score | 12,696 | 0 | 12 | 3.7±2.1 |
| Duration of sleep time | 12,696 | 0.30 h | 16 h | 7.4± 1.7 |
| Sleep efficiency | 12,696 | 22.9% | 100% | 95.4 ± 7.1 |
| Variables | ||||
| <8 | 6,717 (52.9) | |||
| ⩾8 | 5,979 (47.1) | |||
| Yes | 9,313 (73.4) | |||
| No | 3,383 (26.6) | |||
| Yes | 6,613 (52.1) | |||
| No | 6,083 (47.9) | |||
| No | 6,547 (51.6) | |||
| 1–5 | 6,137 (48.3) | |||
| >5 | 12 (0.1) | |||
| Yes | 3,542 (27.9) | |||
| No | 9,154 (72.1) | |||