Table 2: HBV DNA levels in HBsAg-negative pregnant Beninese women divided on the basis of the presence of specific HBV antibodies.
| Sub group | No. | HBV Markers | HBV DNA Positivity | ||
| > 20 IU/mL (95% CI) | < 20 IU/mL (95% CI) | Total (95% CI) | |||
| IIa | 9 | HBsAg-/anti-HBs+/anti-HBc- | 1 (11.1%) (0.00-31.62) | 1 (11.1%) (0.00-31.62) | 2 (22.2%) (0.00-49.35) |
| IIb | 94 | HBsAg-/anti-HBs-/anti-HBc+ | 16 (17.0%) (9.41-24.59) | 10 (10.6%) (4.38-16.82) | 26 (27.6%) (18.56-36.64) |
| IIc | 61 | HBsAg-/anti-HBs+/anti-HBc+ | 8 (13.1%) (4.63-21.57) | 10 (16.4%) (7.11-25.69) | 18 (29.5%) (18.06-40.94) |
| Total | 164 | 25 (15.2%) (9.71-20.69) | 21 (12.8%) (7.69-17.91) | 46 (28.0%) (21.13-34.87) | |