Table 1 Characteristics of respondents by self-reported mental health status since COVID-19
| Â | Mental Health | ||
|---|---|---|---|
| Â | Poorer | Unchanged | Better |
|  | N = 2055 | N = 3298 | N = 1312 |
|  | Mean ± SD/N (%) | Mean ± SD/N (%) | Mean ± SD/N (%) |
Age | 14.42 ± 1.28 | 14.18 ± 1.28 | 14.30 ± 1.26 |
Gender (Male) | 984 (47.9) | 1816 (55.1) | 814 (62.0) |
Satisfaction with academic performance | Â | Â | Â |
 Dissatisfied | 772 (37.6) | 722 (21.9) | 270 (20.6) |
 Neutral | 980 (47.8) | 1934 (58.7) | 729 (55.6) |
 Satisfied | 299 (14.6) | 637 (19.3) | 312 (23.8) |
Satisfaction with school life | Â | Â | Â |
 Dissatisfied | 147 (7.2) | 111 (3.4) | 61 (4.7) |
 Neutral | 869 (42.3) | 1263 (38.3) | 416 (31.7) |
 Satisfied | 1039 (50.6) | 1922 (58.3) | 834 (63.6) |
Relationship with classmates | Â | Â | Â |
 Dissatisfied | 56 (2.7) | 47 (1.4) | 29 (2.2) |
 Neutral | 667 (32.5) | 963 (29.3) | 335 (25.6) |
 Satisfied | 1331 (64.8) | 2281 (69.3) | 946 (72.2) |
Satisfaction with family life | Â | Â | Â |
 Dissatisfied | 221 (10.8) | 123 (3.8) | 50 (3.8) |
 Neutral | 753 (36.8) | 978 (29.9) | 313 (24.1) |
 Satisfied | 1074 (52.4) | 2165 (66.3) | 938 (72.1) |
Average sleeping time in the past month | Â | Â | Â |
 Weekdays |  |  |  |
 7–9 h | 812 (41.5) | 1719 (55.4) | 672 (54.1) |
  < 7 h | 1063 (54.3) | 1214 (39.1) | 481 (38.7) |
  > 9 h | 82 (4.2) | 169 (5.4) | 90 (7.2) |
 Weekends |  |  |  |
 7–9 h | 984 (50.5) | 1678 (54.4) | 628 (50.6) |
 < 7 h | 301 (15.5) | 370 (12.0) | 116 (9.4) |
 > 9 h | 663 (34.0) | 1038 (33.6) | 496 (40.0) |
Average exercise time in the past month | Â | Â | Â |
 Weekdays |  |  |  |
  ≥ 30 min | 1382 (68.7) | 2247 (70.2) | 970 (75.5) |
 Weekends |  |  |  |
  ≥ 30 min | 1320 (65.6) | 2153 (67.1) | 936 (72.6) |