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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Approved by the Federal Government on October 20, 2016
The training courses cover a wide range of technical and disease topics, to help prepare response workers with the skills and knowledge they need in a health emergency.
Information note of the Global Leaders Group on Antimicrobial Resistance.
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• Clashes continued between the Syrian Democratic Forces (SDF), the Syrian Arab Army (SAA), and Turkish backed forces, concentrated around the M4 highway and Tal Tamer district in Al-Hasakeh. Further displacement was reported.
• Several civilian casualties occurred due to improvised explosive ...devices (IEDs) in Afrin, Quamishli, and along the Tell Abiad-Ras al-Ain corridor. On 16 November, a car bomb in Al Bab, Aleppo reportedly killed 14 people and injured 27, including civilians.
• On 13 November, Alouk water station was repaired following reconnection of the Debarseyah supply line, again restoring water to 460,000 people in Al-Hasakeh city and surrounding areas
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