| Risk Factor History | Responses Sought | No. of Responders (%) | No. Positive for HBV (%) | P value | No. Positive for HIV (%) | P Value |
| Needle injury | Yes | 98 (38.4) | 10 (10.2) | 0.875 | 24 (24.5) | 0.010* |
|
| No | 157 (61.6) | 17 (10.8) |
| 19 (12.1) |
|
| Transfusion | Yes | 32 (12.5) | 4 (12.5) | 0.707 | 9 (28.1) | 0.069 |
|
| No | 223 (87.5) | 23 (10.3) |
| 34 (15.2) |
|
| Surgery | Yes | 64 (25.1) | 2 (3.1) | 0.025* | 20 (31.2) | 0.000** |
|
| No | 191 (74.9) | 25 (13.1) |
| 23 (12.0) |
|
| Awareness | Yes | 203 (79.6) | 22 (10.8) | 0.798 | 39 (19.2) | 0.048* |
|
| No | 52 (20.4) | 5 (9.6) |
| 4 (7.7) |
|
| HBV vaccination | Yes | 95 (37.3) | 7 (7.4) | 0.198 | 24 (25.3) | 0.006* |
|
| No | 160 (62.7) | 20 (12.5) |
| 19 (11.9) |
|