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Table 2 Prevalence of hepatitis B virus markers, stratified by age group

From: Hepatitis B virus infection in hilly/mountainous regions of southeastern China: a locality-dependent epidemiology

Age Only anti-HBs HBsAg Anti-HBc Anti-HBs
  No. positive/no. tested Percent No. positive/no. tested Percent No. positive/no. tested Percent No. positive/no. tested Percent
<20 75/155 48.4 5/155 3.2 22/155 14.2 85/155 54.8
20–29 131/562 23.3 51/562 9.1 180/562 32.0 224/562 39.9
30–39 406/1551 26.2 180/1551 11.6 641/1551 41.3 738/1551 47.6
40–49 1047/3385 30.9 374/3385 11.0 1340/3385 39.6 1671/3385 49.4
50–59 670/1839 36.4 228/1839 12.4 814/1839 44.3 1062/1839 57.7
60–69 437/1147 38.1 138/1147 12.0 531/1147 46.3 702/1147 61.2
>70 455/1216 37.4 80/1216 6.6 568/1216 46.7 773/1216 63.6
total 3221/9855 33.9 1056/9855 9.5 4096/9855 35.1 5255/9855 51.0
  1. The positive percentages were standardized by age