Table 1.
Sample characteristics
| Total (n = 5,365) | Online social networking users | ||
| Yes (n = 4,951) | P | ||
| Gender | |||
| Male | 2,533 (47.2) | 2,394 (48.4) | <0.001 |
| Female | 2,832 (52.8) | 2,557 (51.6) | |
| Grade | |||
| Seven | 2,592 (48.3) | 2,379 (48.1) | 0.184 |
| Eight | 2,773 (51.7) | 2,572 (51.9) | |
| Father education level | |||
| Primary school or below | 356 (6.6) | 317 (6.4) | 0.140 |
| Junior middle school | 1,816 (33.9) | 1,683 (34.0) | |
| Senior middle school | 1,646 (30.7) | 1,529 (30.9) | |
| University or above | 1,317 (24.5) | 1,212 (24.5) | |
| Unknown | 230 (4.3) | 210 (4.2) | |
| Mother education level | |||
| Primary school or below | 588 (11.0) | 532 (10.7) | 0.222 |
| Junior middle school | 1,909 (35.6) | 1,761 (35.6) | |
| Senior middle school | 1,497 (27.9) | 1,398 (28.2) | |
| University or above | 1,143 (21.3) | 1,052 (21.2) | |
| Unknown | 228 (4.3) | 208 (4.2) | |
| Family financial status | |||
| Very good/good | 2,519 (47.0) | 2,357 (47.6) | <0.001 |
| Average | 2,664 (49.6) | 2,441 (49.3) | |
| Poor/very poor | 182 (3.4) | 153 (3.1) | |
| Living with both parents | |||
| Yes | 4,712 (87.8) | 4,351 (87.9) | 0.683 |
| No | 653 (12.2) | 600 (12.1) | |
| Academic performance | |||
| Upper | 1,817 (33.9) | 1,679 (33.9) | 0.193 |
| Medium | 2,396 (44.6) | 2,223 (44.9) | |
| Lower | 1,152 (21.5) | 1,049 (21.2) | |
| Perceived academic pressure | |||
| Nil | 205 (3.8) | 186 (3.8) | 0.042 |
| Light | 829 (15.5) | 753 (15.2) | |
| Average | 3,052 (56.9) | 2,836 (57.3) | |
| Heavy | 1,001 (18.7) | 929 (18.8) | |
| Very heavy | 278 (5.2) | 247 (5.0) | |
All P values were obtained by χ2 test.