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Demographic characteristics of included cases
| Variables | Frequency (%) |
|---|---|
| Education (year) | |
| ≤18 | 522 (68.8%) |
| >18 | 236 (31.2%) |
| Marital status | |
| Single | 194 (25.6%) |
| Married | 512 (67.5%) |
| Divorce/widow | 52 (6.9%) |
| Occupation | |
| Unemployed | 582 (76.7%) |
| Employed | 176 (23.2%) |
| Ethnicity | |
| Fars | 43 (5.6%) |
| Turk | 699 (92.2%) |
| Kord | 12 (1.5%) |
| Gilak | 3 (0.3%) |
| Bakhtiari | 1 (0.1%) |
