Table 2.
Demographic characteristics of the research subject, 2005–2017
| Case | Control | |||
|---|---|---|---|---|
| NO. | Percent (%) | NO. | Percent (%) | |
| Marital status | ||||
| Single | 93 | 25.3 | 193 | 26.2 |
| Married | 266 | 72.3 | 536 | 72.8 |
| Divorced | 9 | 2.4 | 7 | 1.0 |
| Education | ||||
| < Primary school | 34 | 9.2 | 38 | 5.2 |
| Middle school | 123 | 33.4 | 214 | 29.1 |
| High school | 107 | 29.1 | 214 | 29.1 |
| Complete university and above | 104 | 28.3 | 270 | 36.7 |
| Sex | ||||
| Male | 177 | 48.1 | 354 | 48.1 |
| Female | 191 | 51.9 | 382 | 51.9 |
| Occupation | ||||
| Worker | 59 | 16.0 | 111 | 15.1 |
| Farmer | 46 | 12.5 | 119 | 16.2 |
| Merchant and commercial service | 95 | 25.8 | 125 | 17.0 |
| Government staff | 40 | 10.9 | 100 | 13.6 |
| Student | 25 | 6.8 | 84 | 11.4 |
| Staff | 38 | 10.3 | 100 | 13.6 |
| Other | 65 | 17.7 | 97 | 13.2 |
Note: 1) The people of divorced group included widowed and separated. 2) The other group in occupation included unemployed self-employed and others