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Table 1 Comparison of the sensitivity and specificity of HBsAg and Anti-HBc Ab detection in DBS and sera

From: The prevalence of hepatitis B virus markers in a cohort of students in Bangui, Central African Republic

   Positive Negative Confirmatory test
  n Sera DBS Sera DBS Sera DBS
HBsAg 15 9 10 6 5 9 9
Anti-HBc Ab 15 10 10 5 5 NA* NA
Anti-HBs Ab 5 1 1 4 4 NA NA
Sensitivity HBsAg 100%      
  Anti-HBc Ab 100%      
Specificity HBsAg 83.3%#      
  Anti-HBc Ab 100%      
  1. *NA: Not Applicable
  2. #100% after confirmatory test.