| Exposure Status | Total (N) | Cases (n) | % | Control (n) | % |
| Exposed | 104 | 80 | 76.9 | 24 | 23.1 |
| Unexposed | 991 | 195 | 19.7 | 796 | 80.3 |
| Unknown/Indeterminate | 5 | 0 | 0 | 5 | 100 |
| Total | 1100 | 275 | 25 | 825 | 75 |