Table 1 Demographic data
Data item | Description | N (%) / (M ± SD) |
|---|---|---|
Age |  | 15 ± 1.6 (years) |
Gender | male | 914 (49.3%) |
female | 911 (49.1%) | |
missing data | 29 (1.6%) | |
Single child | yes | 681 (36.7%) |
no | 1058 (57.1%) | |
missing data | 115 (6.2%) | |
Academic performance | excellent | 271 (14.6%) |
good | 529 (28.5%) | |
average | 815 (44.0%) | |
bad | 208 (11.2%) | |
missing data | 31 (1.7%) | |
Academic stress | low | 111 (6.0%) |
average | 1098 (59.2%) | |
high | 638 (34.4%) | |
missing data | 7 (0.4%) | |
missing data | 10 (0.5%) | |
Physical exercise | yes | 1670 (90.1%) |
no | 180 (9.7%) | |
missing data | 4 (0.2%) | |
Internet addiction | yes | 847 (45.7%) |
no | 1007 (54.3%) | |
missing data | 0 | |
Cyber victimization | yes | 160 (8.6%) |
no | 1694 (91.4%) | |
missing data | 0 |