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Table 5 Prevalence of chronic hepatitis B in the San Francisco Bay area by age and disease status

From: Racial/ethnic- and county-specific prevalence of chronic hepatitis B and its burden in California

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%)
  1. aInactive CHB are those who are HBsAg positive with low HBV DNA or high HBV DNA but normal alanine aminotransferase or ALT levels
  2. HBeAg hepatitis B e antigen