Adolescent ; Adult ; Aged ; Aged, 80 and over ; Antigens, Viral/blood* ; Child ; Child, Preschool ; False Positive Reactions* ; Female ; HIV Antibodies/blood* ; HIV Infections/diagnosis* ; HIV Infections/epidemiology ; Humans ; Immunoassay/methods ; Infant ; Infant, Newborn ; Male ; Middle Aged ; Predictive Value of Tests ; Prevalence ; Retrospective Studies ; Sensitivity and Specificity ; Virology/methods* ; Young Adult
Abstract
We retrospectively analyzed the performance of the Architect HIV antigen/antibody (Ag/Ab) combination assay in a tertiary health care center with a situation of low HIV prevalence. The specificity and positive predictive value (PPV) were 99.78% and 31.21%, respectively. However, the specificity and PPV could increase to 99.99% and 89.70% using an arbitrary cutoff value.