Defending HIV seroprevalence surveys.

Implications of the HIV testing protocol for refusal bias in seroprevalence surveys

BACKGROUND HIV serosurveys have become important sources of HIV prevalence estimates, but these estimates may be biased because of refusals and other forms of non-response. We investigate the effect of the post-test counseling study protocol on bias due to the refusal to be tested. METHODS Data come from a nine-month prospective study of hospital admissions in Addis Ababa during which patient...

Disclosure of HIV Test Results and Non-response Bias in Seroprevalence Surveys

Evaluation of bias in HIV seroprevalence estimates from national household surveys

OBJECTIVES To evaluate HIV seroprevalence estimates from demographic and health surveys (DHS) and AIDS indicator surveys (AIS) for potential bias because of non-response and exclusion of non-household population groups. METHODS Data are from 14 DHS/AIS surveys with HIV testing, conducted during 2003-6. Blood samples were collected and analysed for HIV using standard laboratory and quality con...

HIV seroprevalence among eunuchs.

Seroprevalence of toxoplasmosis among HIV/AIDS patients

This study aims to evaluate the current seroprevalence of toxoplasmosis among indigenous communities in Peninsular Malaysia and relate its association with epidemiological data. Overall seroprevalence of Toxoplasma gondii was 37.0% with 31.0% immunoglobulin (Ig) G, 1.8% IgM, and 4.2% seropositivity for both antiToxoplasma antibodies. Multivariate analysis showed that age above 12 years (odds ra...