ArticleThe American journal of tropical medicine and hygiene2018
Quality Assurance and Quality Control in the Global Trachoma Mapping Project.
Article in The American journal of tropical medicine and hygiene, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 65 papers, 5 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
65 citing papers in PubMed, 5 syntheses or guidelines pooled it.
- Community-level trachoma ecological associations and the use of geospatial analysis methods: A systematic review.PLoS neglected tropical diseases · 2022Pooled it
- The impact of access to water supply and sanitation on the prevalence of active trachoma in Ethiopia: A systematic review and meta-analysis.PLoS neglected tropical diseases · 2021Pooled it
- Prevalence and associated factors of active trachoma among children in Ethiopia: a systematic review and meta-analysis.BMC infectious diseases · 2019Pooled it
- Progress Towards Elimination of Trachoma as a Public Health Problem in Eritrea: Results of a Systematic Review and Nine Population-based Prevalence Surveys Conducted in 2014.Ophthalmic epidemiology · 2018Pooled it
- A search for trachoma in Timor-Leste: no evidence to justify undertaking population-based prevalence surveys.Ophthalmic epidemiology · 2018Pooled it
- Comparison of platforms for testing antibodies to Chlamydia trachomatis antigens in the Democratic Republic of the Congo and Togo.Scientific reports · 2021Trial
- National progress towards the elimination of trachomatous inflammation-follicular: analysis of 11 regions in Ethiopia.International health · 2026Article
- Does persistent active trachoma mandate antibiotic mass drug administration? A comparison of prevalence of trachomatous inflammation-follicular with that of conjunctival infection and anti-chlamydial antibodies, Western Province, Zambia.International health · 2026Article
- Trachoma prevalence surveys in 15 indigenous and non-indigenous evaluation units in Brazil, 2018-2023.International health · 2026Observational
- Prevalence and associations of trachoma before interventions in six departments of the Colombian Amazon and Orinoquía.PloS one · 2026Article
- Surveys to substantiate elimination of trachoma as a public health problem in the Republic of the Union of Myanmar.International health · 2025Article
- Understanding the impact of covariates for trachoma prevalence prediction using geostatistical methods.BMC global and public health · 2025Article
- Trachoma.Lancet (London, England) · 2025Review
- Assessing the prevalence of trachoma in the East, North, Far North and Adamaoua regions of Cameroon, 2016-2022.International health · 2025Article
- Tropical Data: supporting health ministries worldwide to conduct high-quality trachoma surveys.International health · 2025Article
- Impact of trachoma elimination efforts in afar regional state, Ethiopia: survey findings from 26 evaluation units.BMC infectious diseases · 2025Article
- Prevalence of Trachoma in Four Evaluation Units in Yemen after Implementation of Trachoma Elimination Measures.Ophthalmic epidemiology · 2024Article
- Trachoma Impact Survey Results from 31 Woredas in Tigray Region, Ethiopia.Ophthalmic epidemiology · 2024Article
- Twenty-Three Population-Based Trachoma Prevalence Surveys in the Central and Northern Regions of Benin, 2018-2022.Ophthalmic epidemiology · 2024Article
- Prevalence of Trachoma After Three Rounds of Antibiotic Mass Drug Administration in 13 Woredas of Gambella Region, Ethiopia.Ophthalmic epidemiology · 2024Article
5 more citing papers are in PubMed but not listed here.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
31 authors.
Funding
Abstract
In collaboration with the health ministries that we serve and other partners, we set out to complete the multiple-country Global Trachoma Mapping Project. To maximize the accuracy and reliability of its outputs, we needed in-built, practical mechanisms for quality assurance and quality control. This article describes how those mechanisms were created and deployed. Using expert opinion, computer simulation, working groups, field trials, progressively accumulated in-project experience, and external evaluations, we developed 1) criteria for where and where not to undertake population-based prevalence surveys for trachoma; 2) three iterations of a standardized training and certification system for field teams; 3) a customized Android phone-based data collection app; 4) comprehensive support systems; and 5) a secure end-to-end pipeline for data upload, storage, cleaning by objective data managers, analysis, health ministry review and approval, and online display. We are now supporting peer-reviewed publication. Our experience shows that it is possible to quality control and quality assure prevalence surveys in such a way as to maximize comparability of prevalence estimates between countries and permit high-speed, high-fidelity data processing and storage, while protecting the interests of health ministries.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.