Table 5.
Prevalence of chronic hepatitis B in the San Francisco Bay area by age and disease status
| Age Group (Years) | Population (2015) | Inactivea CHB | Active HBeAg positive | Active HBeAg negative | Cirrhosis |
|---|---|---|---|---|---|
| 0–19 | 2,202,500 | 1805 (69.2%) | 602 (23.1%) | 201 (7.69%) | 0 |
| 20–29 | 1,254,437 | 5360 (48.3%) | 2744 (24.7%) | 2701(24.3%) | 300 (2.70%) |
| 30–39 | 1,311,988 | 12,218 (50.0%) | 4680 (19.2%) | 6834 (28.0%) | 704 (2.88%) |
| 40–49 | 1,230,512 | 13,111 (51.2%) | 2930 (11.4%) | 7450 (29.1%) | 2136 (8.33%) |
| 50–59 | 1,192,159 | 9770 (51.1%) | 1199 (6.27%) | 5154 (27.0%) | 2997 (15.7%) |
| 60–69 | 898,217 | 7939 (61.4%) | 438 (3.38%) | 1813 (14.0%) | 2751 (21.3%) |
| 70–79 | 473,888 | 3186 (52.1%) | 382 (6.25%) | 1020 (16.7%) | 1529 (25.0%) |
| 80+ | 310,260 | 1448 (52.1%) | 174 (6.25%) | 463 (16.7%) | 695 (25.0%) |
| Total | 8,873,961 | 54,837 (52.4%) | 13,149 (12.6%) | 25,636 (24.5%) | 11,112 (10.6%) |
aInactive CHB are those who are HBsAg positive with low HBV DNA or high HBV DNA but normal alanine aminotransferase or ALT levels
HBeAg hepatitis B e antigen