This report investigates the impact of potential misclassification of samples on HIV prevalence estimates for 23 surveys conducted from 2010-2014. In addition to visual inspection of laboratory results, we examined how accounting for potential misclassification of HIV status through Bayesian latent ...class models affected the prevalence estimates. Two types of Bayesian models were specified: a model that only uses the individual dichotomous test results and a continuous model that uses the quantitative information of the EIA (i.e., the signal-to-cutoff values). Overall, we found that adjusted prevalence estimates matched the surveys’ original results, with overlapping uncertainty intervals. This suggested that misclassification of HIV status should not affect the prevalence estimates in most surveys. However, our analyses suggested that two surveys may be problematic. The prevalence could have been overestimated in the Uganda AIDS Indicator Survey 2011 and the Zambia Demographic and Health Survey 2013-14, although the magnitude of overestimation remains difficult to ascertain. Interpreting results from the Uganda survey is difficult because of the lack of internal quality control and potential violation of the multivariate normality assumption of the continuous Bayesian latent class model. In conclusion, despite the limitations of our latent class models, our analyses suggest that prevalence estimates from most of the surveys reviewed are not affected by sample misclassification.
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Department of AIDS Control
Ministry of Health & Family Welfare
Zero new HIV infections
Zero Discrimination
Zero AIDS related deaths
Accessed: 04.10.2019
A formulary of dermatological preparations and background information on therapeutic choices, production and dispensing. 2nd edition
2nd edition. Essential guideline for humanitarian assistance
The WHO Global Polio Eradication Initiative (GPEI)’s new Polio Eradication and Endgame Strategic Plan targets the end of all kinds of polioviruses by 2018, including the wild and rare vaccine-related strains which cause paralysis among thousands of children worldwide. The plan is focused on develo...ping and deploying a shot version of the anti-polio vaccine to replace the current oral variant, which is known to occasionally cause the same disease that it is supposed to prevent. This document is intended for the use of individuals and organizations involved in polio eradication efforts
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THE SYRIAN ARAB REPUBLIC, IRAQ, JORDAN, LEBANON, TURKEY, WEST BANK AND GAZA STRIP, EGYPT