Table 1. Selection of the case group.
| Characteristics of the cases | Group 1 aNo (%) | Group 2 bNo (%) | Total No (%) |
| n = 1523 | n = 80 | n = 1603 | |
| ALT ≥ 80(IU/L) | 122 (8) | 23 (29) | 145 (9) |
| AST ≥ 80(IU/L) | 76 (4.9) | 13 (16) | 89 (5.6) |
| High levels of α-fetoprotein | 60 (3.9) | 2 (3) | 62 (3.9) |
| Lost HBsAg | 45 (2.9) | 3 (4) | 48 (2.9) |
| Serocoverted to anti-HBs | 2 (0.13) | 0 (0) | 2 (0.12) |
| Detectable HBV DNA | 12 (0.8) | 0 (0) | 12 (0.7) |
| Undetectable HBV DNA | 31 (2) | 3 (4) | 34 (2.1) |
a Group 1: HBsAg- and anti-HBe-positive cases
b Group 2: HBsAg- and HBeAg-positive cases