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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 resu
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lts, 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.
more
HIV Prevalence Patterns by Age and sex: Exploring Differences among 19 Countries
Chaitra Gopalappa, John Stover & Carel Pretorius
ICF International Calverton, Maryland, USA
(2013)
C2
DHS Analytical Studies No. 40
DHS Working Papers No. 111 | Zimbabwe Working Papers No. 12
DHS Comparative Reports No. 42
Progress in reducing tobacco use is a key indicator for measuring countries’ efforts to implement the WHO Framework Convention on Tobacco Control – target 3.a under the Sustainable Development Goals agenda. Countries have adopted this indicator to report progress also towards the tobacco reducti
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on target under the Global Action Plan for the Prevention and Control of Noncommunicable Diseases 2013–2020 and the WHO’s Global Programme of Work triple billions target.
Fourth edition.
more
Final Survey Report
Surveys are needed to guide trachoma control efforts in Mozambique, with WHO guidelines for intervention based on the prevalence of trachomatous inflammation–follicular (TF) in children aged 1–9
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years and the prevalence of trichiasis in adults aged 15 years and above. We conducted surveys to complete the map of trachoma prevalence in Mozambique, concluding that it still represents a significant public health problem in many areas of Mozambique.
more
The World Health Organization (WHO) endorses the use of population-based prevalence surveys for estimating the prevalence of trachoma. In general,
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the prevalence of TF in children aged 1–9 years and the prevalence of TT in adults aged ≥ 15 years are measured at the same time in any district being surveyed. This was the approach of the Global Trachoma Mapping Project, which undertook baseline surveys in > 1500 districts worldwide in order to provide the data required to start interventions where needed.
The survey design recommended by WHO is a two-stage cluster random sample survey, which uses probability proportional to size sampling to select 20–30 villages, and random, systematic or quasi-random sampling to select 25–30 households in each of those villages. In most surveys, everyone aged ≥ 1 year living in selected households is examined. more
The survey design recommended by WHO is a two-stage cluster random sample survey, which uses probability proportional to size sampling to select 20–30 villages, and random, systematic or quasi-random sampling to select 25–30 households in each of those villages. In most surveys, everyone aged ≥ 1 year living in selected households is examined. more
DHS Working Papers No. 85
Lancet Public health 2022 January 6, 2022 https://doi.org/10.1016/ S2468-2667(21)00249-8
Growth in the number of individuals living with dementia underscores the need for public health planning efforts and policy to address the needs of this group. Country-level estimates can be used to inform nati
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onal planning efforts and decisions. Multifaceted approaches, including scaling up interventions to address modifiable risk factors and investing in research on biological mechanisms, will be key in addressing the expected increases in the number of individuals affected by dementia.
more
Monitoring HIV impact using population-based surveys
UNAIDS (Joint United Nations Programme on HIVAIDS); World Health Organization (WHO)
UNAIDS (Joint United Nations Programme on HIVAIDS); World Health Organization (WHO)
(2015)
C2
UNAIDS/WHO Working group
HIV/AIDS and STI surveillance 2015 / Reference
Child Survival by HIV Status of the Mother: Evidence from DHS and AIS Surveys. DHS Comparative Reports No. 35
Fishel, Joy D., Ruilin Ren, Bernard Barrère, and Trevor N. Croft
Maryland, USA: ICF International
(2014)
C2
www.jogh.org • doi: 10.7189/jogh.02.020405 ~ December 2012 • Vol. 2 No. 2 • 020405
The Lancet Published Online
October 8, 2021 https://doi.org/10.1016/ S0140-6736(21)02143-7
