| Study region | HBsAg (n/N) % | 95% CI | |
| Nairobi | 1/4 | 25 | [0.6; 80.6] |
| Coast | 2/9 | 22.2 | [2.8; 60.0] |
| Nyanza/Western | 2/11 | 18.2 | [2.3; 51.8] |
| Rift Valley | 3/12 | 25.0 | [5.5; 57.2] |
| Eastern | 2/6 | 33.3 | [4.3; 77.7] |
| Central | 1/4 | 25.0 | [0.6; 80.6] |
| Total | 11/46 | 23.9 | [12.6; 38.8] |