A model to estimate risk of infection with human herpesvirus 8 associated with transfusion from cross-sectional data |
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Authors: | Pfeiffer Ruth M Mbulaiteye Sam Engels Eric |
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Institution: | Biostatistics Branch, National Cancer Institute, Bethesda, Maryland 20892-7244, USA. pfeiffer@mail.nih.gov |
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Abstract: | In cross-sectional studies of infectious diseases, the data typically consist of: age at the time of study, status (presence or absence) of infection, and a chronology of events possibly associated with the disease. Motivated by a study of how human herpesvirus 8 (HHV-8) is transmitted among children with sickle cell anemia in Uganda, we have developed a flexible parametric approach for combining current-status data with a history of blood transfusions. We model heterogeneity in transfusion-associated risk by a child-specific random effect. We present an extension of the model to accommodate the fact that there is no gold standard for HHV-8 infection and infection status was assessed by a serological assay. The parameters are estimated via maximum likelihood. Finally, we present results from applying various parameterizations of the model to the Ugandan study. |
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Keywords: | Age at transfusion data Current-status data Mixture models Multistate models |
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