Table 1.
Demographic characteristic of patients
| Patients | Controls | |
|---|---|---|
| Age (yr) (mean ±SD) | 32.8±8.9 | 30.3±5.6 |
| Sex (M/F) | 28/138 | 47/63 |
| Marital status(single/married) | 51/115 | 44/66 |
| Level of education (mean±SD) | 13±2.9 | 18.2±1.8 |
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