Table 1.
Demographic Characteristics
| n (%) | |
|---|---|
| Total | 223542 |
| Year | |
| 2008 | 75238 (33.7) |
| 2009 | 75066 (33.6) |
| 2010 | 73238 (32.8) |
| Sex | |
| Male | 117281 (52.5) |
| Female | 106261 (47.5) |
| Grade | |
| Middle-school 1st | 38219 (17.1) |
| Middle-school 2nd | 38423 (17.2) |
| Middle-school 3rd | 38280 (17.1) |
| High-school 1st | 37218 (16.6) |
| High-school 2nd | 36926 (16.5) |
| High-school 3rd | 34476 (15.4) |
| PIU | |
| Total | 13056 (5.8) |
| High risk user | 7183 (3.2) |
| Potential risk user | 5873 (2.6) |
| Depressive episode; yes | 84848 (38.0) |
| Suicidal ideation; yes | 42728 (19.1) |
| Suicidal attempt; yes | 10778 (4.8) |
| Socioeconomic Status | |
| High | 13775 (6.2) |
| High-middle | 48348 (21.6) |
| Middle | 105472 (47.2) |
| Low-middle | 41322 (18.5) |
| Low | 14625 (6.5) |
| School Achievement | |
| High | 25440 (11.4) |
| High-middle | 52399 (23.4) |
| Middle | 60448 (27.0) |
| Low-middle | 57183 (25.6) |
| Low | 28072 (12.6) |
Abbreviation: PIU, problematic internet use.