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