Each study is represented horizontally. From L-R: reference number, first author, city in which study conducted, year in which study published; Dot and bar represent the point prevalence of HBV with calculated 95% confidence interval; lab technique used to detect HBsAg; and sample size of the study. The vertical line represents the calculated weighted average prevalence of HBV based on all the studies in the particular group.
ELISA (#) =Enzyme linked immunosorbent assay (# represents generation of test); RPHA=Reverse particle hemagglutination assay; ICT=Immuno-chromatographic test; LPA=Latex particle agglutination; MEIA (#)=Micro enzyme immunoassay (# represents generation of test); RIBA=Recombinant immunoblot assay; ??=unknown