Table 1.
Demographic characteristics of the study sample (n = 4805)
| Variables | Total, n (%) | Depression | p value | |
|---|---|---|---|---|
| No, n (%) | Yes, n (%) | |||
| Age, year | < 0.001* | |||
| 11–14 | 2114 (44.0) | 1462 (69.2) | 652 (30.8) | |
| 15–18 | 2691 (56.0) | 1444 (53.7) | 1247 (46.3) | |
| Grade | < 0.001* | |||
| Junior secondary school | 2692 (56.0) | 1789 (66.5) | 903 (33.5) | |
| Senior secondary school | 2113 (44.0) | 1117 (52.9) | 996 (47.1) | |
| Participating in distant learning | < 0.001* | |||
| Yes | 4459 (92.8) | 2747 (61.6) | 1712 (38.4) | |
| No | 346 (7.2) | 159 (46.0) | 187 (54.0) | |
| Study duration/day, h | 0.067 | |||
| < 4 | 3254 (67.7) | 1939 (59.6) | 1318 (40.4) | |
| ≥ 4 | 1551 (32.3) | 967 (62.3) | 584 (37.7) | |
| Parents as frontline workers | 0.345 | |||
| Yes | 415 (8.6) | 242 (58.3) | 173 (41.7) | |
| No | 4390 (91.4) | 2664 (60.7) | 1726 (39.3) | |
| Having infected acquaintances | 0.536 | |||
| Yes | 160 (3.3) | 93 (58.1) | 67 (41.9) | |
| No | 4645 (96.7) | 2813 (60.6) | 1832 (39.4) | |
| No. of infected patients at living province | 0.020* | |||
| < 1000 | 4031 (83.9) | 2409 (59.8) | 1622 (40.2) | |
| ≥ 1000 | 774 (16.1) | 497 (64.2) | 277 (35.8) | |
| Concerned about COVID-19 | 0.001* | |||
| Yes | 4765 (99.2) | 2892 (60.7) | 1873 (39.3) | |
| No | 40 (0.8) | 14 (35.0) | 26 (65.0) | |
| Sleep duration/day, h | < 0.001* | |||
| < 6 | 218 (4.5) | 77 (35.3) | 141 (64.7) | |
| 6–8 | 2854 (59.4) | 1672 (58.6) | 1182 (41.4) | |
| > 8 | 1733 (36.1) | 1157 (66.8) | 576 (33.2) | |
| Physical exercise duration/day (indoor and outdoor), min | < 0.001* | |||
| < 30 | 2364 (49.2) | 1268 (53.6) | 1096 (46.4) | |
| 30–60 | 2127 (44.3) | 1432 (67.3) | 695 (32.7) | |
| > 60 | 314 (6.5) | 206 (65.6) | 108 (34.4) | |
| Residence | 0.07 | |||
| Dorm | 4215 (87.7) | 2529 (60.0) | 1686 (40.0) | |
| No dorm | 590 (12.3) | 377 (63.9) | 213 (36.1) | |
* Statistically significant