Table 1.
Characteristics of case and control.
| Characteristic | Cases | Controls |
|---|---|---|
| Sample size (n) | 105 | 110 |
| Age (mean ± SD) | 33.59 ± 0.97 | 32.46 ± 0.91 |
| Age groups | ||
| <30.5 years | 50 (47.6%) | 58 (52.7%) |
| ≥30.5 years | 55 (52.4%) | 52 (47.3%) |
| Sex | ||
| Female | 80 (76.2%) | 89 (80.9%) |
| Male | 25 (23.8%) | 21 (19.1%) |
| Place of residence | ||
| Urban | 52 (49.5%) | 58 (52.7%) |
| Rural | 53 (50.5%) | 52 (47.3%) |
| Level of education | ||
| Below high school diploma | 44 (41.9%) | 44 (40.0%) |
| Above high school diploma | 61 (58.1%) | 66 (60.0%) |
| Duration of sun light exposure (mean ± SE) | 98.14 ± 6.54 min/day | 94.51 ± 8.93 min/day |
| Groups of sun light exposure | ||
| 0–120 min/day | 83 (79.0%) | 90 (81.8%) |
| ≥120 min/day | 22 (21.0%) | 20 (18.2%) |