| Exposure Status | Total (N) | Cases (n) | % | Control (n) | % |
| Exposed | 55 | 40 | 72.7 | 15 | 27.3 |
| Unexposed | 600 | 125 | 20.8 | 475 | 79.2 |
| Unknown/Indeterminate | 5 | 0 | 0 | 5 | 100 |
| Total | 660 | 165 | 25 | 495 | 75 |