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Prevalence of anti-HBc and anti-HBs in study population
| Donor category | Number | Anti-HBc total | Anti-HBc-only | Anti-HBc and anti-HBs |
| Voluntary (%) | 998 (58.7) | 69 (6.9) | 34 (3.4) | 35 (3.5) |
| Replacement (%) | 702 (41.3) | 73 (10.4) | 36 (5.1) | 37 (5.3) |
| Total (%) | 1700 | 142 (8.4) | 70 (4.1) | 72 (4.2) |
| P value | 0.011 | 0.038 | 0.03 |
