Table 1.
Participants’ general characteristics
| Characteristics | Frequency | % |
| Residence | ||
| Seoul | 611 | 59.8 |
| Metropolitan area | 411 | 40.2 |
| Gender | ||
| Male | 612 | 59.9 |
| Female | 410 | 40.1 |
| Age (years) | ||
| 20–29 | 357 | 34.9 |
| 30–39 | 463 | 45.3 |
| 40–49 | 202 | 19.8 |
| Academic background | ||
| High school graduate or less | 75 | 7.3 |
| College graduate | 811 | 79.4 |
| Graduate school | 136 | 13.3 |
| Employment | ||
| Office worker | 402 | 39.3 |
| Administrative position | 78 | 7.6 |
| Service industry | 74 | 7.2 |
| Professional tech worker | 130 | 12.7 |
| Production employee | 26 | 2.5 |
| Student | 145 | 14.2 |
| Housewife | 85 | 8.3 |
| Unemployed and other | 82 | 8 |
| Marital status | ||
| Single | 518 | 50.7 |
| Couple | 504 | 49.3 |
| Income level | ||
| Poor | 449 | 43.9 |
| Fair | 423 | 41.4 |
| Good | 150 | 14.7 |
| Psychiatric history | ||
| No | 994 | 97.3 |
| Yes | 28 | 2.7 |
| Condition | ||
| Normal comparison group | 511 | 50 |
| Problematic Internet game user group | 511 | 50 |
| Total | 1,022 | 100 |
Note. Single: never married, divorced, separated, or widowed; Couple: married or living with a partner.