| Yes | - | 296 (15.4) | 467 (25.3) | 771 (33.8) | 512 (26.1) |
|
| No | - | 1622 (84.6) | 1377 (74.7) | 1511 (66.2) | 1447 (73.9) |
|
| Joining chat rooms |
|
|
|
|
|
|
| In continuous (hrs/d) | - | 0.15 (0.52) | 0.22 (0.57) | 0.25 (0.58) | 0.29 (0.73) | <0.001 |
| In categorical |
|
|
|
|
| <0.001 |
| Yes | - | 297 (15.5) | 479 (26.0) | 701 (30.7) | 593 (30.3) |
|
| No | - | 1621 (84.5) | 1365 (74.0) | 1581 (69.3) | 1361 (69.7) |
|
| Computer games |
|
|
|
|
|
|
| In continuous (hrs/d) | - | 0.18 (0.61) | 0.25 (0.65) | 0.30 (0.67) | 0.30 (0.73) | <0.001 |
| In categorical |
|
|
|
|
| <0.001 |
| Yes | - | 327 (17.0) | 485 (26.3) | 779 (34.1) | 648 (33.1) |
|
| No | - | 1591 (83.0) | 1359 (73.7) | 1504 (65.9) | 1310 (66.9) |
|
| Watching movies |
|
|
|
|
|
|
| In continuous (hrs/d) | - | - | 0.18 (0.57) | 0.21 (0.58) | 0.20 (0.60) | <0.001 |
| In categorical |
|
|
|
|
| 0.018 |
| Yes | - | - | 313 (17.0) | 459 (20.1) | 393 (20.1) |
|
| No | - | - | 1532 (83.0) | 1826 (79.9) | 1565 (79.9) |
|
| Total |
|
|
|
|
|
|
| In continuous (hrs/d) | 1.45 (1.18) | 1.99 (1.78) | 2.35 (2.07) | 2.47 (2.07) | 1.95 (2.40) | <0.001 |
| In categorical |
|
|
|
|
| <0.001 |
| ≤2 hrs/d | 1840 (77.3) | 1224 (64.2) | 1051 (55.8) | 1215 (53.8) | 1551 (66.1) |
|
| >2 hrs/d | 539 (22.7) | 683 (35.8) | 831 (44.2) | 1045 (46.2) | 797 (33.9) |
|