| Variables | Population recruited in Cotonou | Population recruited in Dakar | ||||
|
| N | % | p-value | N | % | p-value |
| Blood transfusions | ||||||
| Yes | 22 | 9.4 | 0.38 | 14 | 4.9 | 0.12 |
| No | 212 | 90.6 | 222 | 94.1 | ||
| Hepatitis B in the family environment | ||||||
| Yes | 2 | 0.9 | 1.00 | 22 | 9.3 | 0.62 |
| No | 232 | 99.1 | 214 | 90.7 | ||
| Haemodialysis | ||||||
| Yes | 0 | 0 | 1.00 | 1 | 0.4 | 1.00 |
| No | 234 | 100 | 235 | 99.9 | ||
| Piercing | ||||||
| Yes | 130 | 55.6 | 0.041 | 127 | 53.8 | 0.002 |
| No | 104 | 44.4 | 109 | 46.2 | ||
| Tattoos | ||||||