Assays for hepatitis B surface antigen (HBsAg) are the most frequently used tests to detect HBV infection. Vaccination for HBV can produce transiently detectable levels of HBsAg in patients.

HBsAg seroreversion was associated with serum ... and as median and range for discrete variables. Fisher's exact test and Wilcoxon's rank-sum test were used to evaluate differences in the ...