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Distribution of subjects according to demographic variables
| Variables | Categories | Cases (%) | Controls (%) |
|---|---|---|---|
| Age (years) | 35–40 | 9 (15) | 10 (16.7) |
| 41–49 | 12 (20) | 15 (25) | |
| 50–60 | 18 (30) | 20 (33.3) | |
| 60–65 | 21 (35) | 15 (20) | |
| Gender | Male | 48 (80) | 42 (70) |
| Female | 12 (20) | 18 (30) | |
| School level | Illiterate | 50 (83.3) | 15 (25) |
| Elementary school | 10 (16.7) | 45 (75) | |
| Occupation | Farmers | 20 (33.3) | 25 (41.7) |
| Labourers | 20 (33.3) | 20 (33.3) | |
| Artisans | 15 (25) | 12 (20) | |
| Traders | 5 (8.4) | 3 (5) |
