| Years of Service | Tested | HBV+ (%) | HIV+ (%) |
| ≤1 | 48 | 10 (20.8) | 4 (8.3) |
| 2 - 5 | 101 | 9 (8.9) | 19 (18.8) |
| 6 - 10 | 44 | 3 (6.8) | 13 (29.5) |
| ≥11 | 62 | 5 (8.1) | 7 (11.3) |
| Total | 255 | 27 (10.6) | 43 (16.9) |
| χ2 |
| 6.700 | 9.186 |
| df |
| 3 | 3 |
| P value |
| 0.082 | 0.027 |