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Table 1 HBsAg status in early adult life by number of doses of HBV vaccine in infancy among GHIS participants with reliable original vaccination records still available

From: Efficacy and effectiveness of infant vaccination against chronic hepatitis B in the Gambia Hepatitis Intervention Study (1986–90) and in the nationwide immunisation program

  HBsAg + (%) 95% CI Odds ratio
HBV vaccine doses
0 59/475 (12.4%) 9.6 - 15.6 1
1 (partially vaccinated) 2/ 13 (15.4%) 1.9 - 45.4 1.28
2 (partially vaccinated) 2/ 10 (20.0%) 2.5 - 55.6 1.76
3 (fully vaccinated) 1/ 63 ( 1.6%) 0.4 - 8.5 0.11
4 (fully vaccinated) 1/192 ( 0.5%) 0.1 - 2.9 0.04
Total 65/753   -
  1. p (trend) <0.0001.