The Global Trachoma Mapping Project: Methodology of a 34-Country Population-Based Study.
Ophthalmic Epidemiol
; 22(3): 214-25, 2015.
Article
em En
| MEDLINE
| ID: mdl-26158580
ABSTRACT
PURPOSE:
To complete the baseline trachoma map worldwide by conducting population-based surveys in an estimated 1238 suspected endemic districts of 34 countries.METHODS:
A series of national and sub-national projects owned, managed and staffed by ministries of health, conduct house-to-house cluster random sample surveys in evaluation units, which generally correspond to "health district" size populations of 100,000-250,000 people. In each evaluation unit, we invite all residents aged 1 year and older from h households in each of c clusters to be examined for clinical signs of trachoma, where h is the number of households that can be seen by 1 team in 1 day, and the product h × c is calculated to facilitate recruitment of 1019 children aged 1-9 years. In addition to individual-level demographic and clinical data, household-level water, sanitation and hygiene data are entered into the purpose-built LINKS application on Android smartphones, transmitted to the Cloud, and cleaned, analyzed and ministry-of-health-approved via a secure web-based portal. The main outcome measures are the evaluation unit-level prevalence of follicular trachoma in children aged 1-9 years, prevalence of trachomatous trichiasis in adults aged 15 + years, percentage of households using safe methods for disposal of human feces, and percentage of households with proximate access to water for personal hygiene purposes.RESULTS:
In the first year of fieldwork, 347 field teams commenced work in 21 projects in 7 countries.CONCLUSION:
With an approach that is innovative in design and scale, we aim to complete baseline mapping of trachoma throughout the world in 2015.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Tipo de estudo:
Prevalence_studies
/
Risk_factors_studies
Limite:
Adolescent
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Child
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Child, preschool
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Female
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Humans
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Infant
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Male
Idioma:
En
Ano de publicação:
2015
Tipo de documento:
Article