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Cases and controls: Frequency distribution of various categorical variables: n=40.
| Cases= 40 | ||
|---|---|---|
| Variables | Frequency | Percentage % |
| Gender | ||
| Male | 25 | 62.5 |
| Female | 15 | 37.5 |
| Eye | ||
| Right | 19 | 42.2 |
| Left | 26 | 57.7 |
| Laterality | ||
| Unilateral | 35 | 87.5 |
| Bilateral | 5 | 12.5 |
| Controls= 40 | ||
| Variables | Frequency | Percentage % |
| Gender | ||
| Male | 22 | 55 |
| Female | 18 | 45 |
| Eye | ||
| Right | 20 | 46.5 |
| Left | 23 | 42.4 |
| Laterality | ||
| Unilateral | 37 | 86.0 |
| Bilateral | 6 | 13.9 |
