Evidence map›Paper›PMID 30806544›Full record

ArticleOphthalmic epidemiology2018

Prevalence of trachoma in the Republic of Chad: results of 41 population-based surveys.

Djoré Dézoumbé, Djibrine-Atim Djada, Tyau-Tyau Harba, Jean-Eudes Biao, Barka Kali, Jérôme Bernasconi, Doniphan Hiron, Karim Bengraïne, Susan D'Souza, Rebecca Willis and 4 more

Open access · hybridAbstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Ophthalmic epidemiology, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.

0numbers the graph read from it
0cells of the map it votes in
5citing papers in PubMed
0.5field-weighted citation impact, top 36% of its field
1 · What the graph read from 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.

2 · The registry

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.

3 · Its place in the literature

Who cites it

5 citing papers in PubMed, 6 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. Article
  5. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

14 authors at 7 institutions in 7 countries.

Djoré Dézoumbéa Programme national de lutte contre la cécité , Ministère de la Santé Publique , N'Djamena , Tchad.
Djibrine-Atim Djadab Hôpital Général de Référence , N'Djamena , Tchad.
Tyau-Tyau Harbac Faculté de Médecine , Abéché , Tchad.
Jean-Eudes Biaod Organisation pour la Prévention de la Cécité , N'Djamena , Tchad.
Barka Kalid Organisation pour la Prévention de la Cécité , N'Djamena , Tchad.
Jérôme Bernasconie Organisation pour la Prévention de la Cécité , Paris , France.
Doniphan Hirone Organisation pour la Prévention de la Cécité , Paris , France.
Karim Bengraïnee Organisation pour la Prévention de la Cécité , Paris , France.
Susan D'Souzaf Sightsavers , Haywards Heath , UK.
Rebecca Willisg Task Force for Global Health , Decatur , GA , USA.
Ana Bakhtiarig Task Force for Global Health , Decatur , GA , USA.
Serge Resnikoffe Organisation pour la Prévention de la Cécité , Paris , France.
Paul Courtrighth Kilimanjaro Centre for Community Ophthalmology, Division of Ophthalmology , University of Cape Town , Cape Town , South Africa.
Anthony W Solomoni Clinical Research Department , London School of Hygiene & Tropical Medicine , London , UK.
The Task Force for Global Health · USUniversity of N'Djamena · TDLaboratoire National de Référence · MALondon School of Hygiene & Tropical Medicine · GBMinistère de la Santé · TNSightsavers · GBUniversity of Cape Town · ZA

Funding

Medical Research Council MR/K012126/1Wellcome Trust 098521World Health Organization 001
6 · The paper itself

Abstract

purposeTo estimate the prevalence of trachoma in suspected-endemic areas of Chad, and thereby determine whether trachoma is a public health problem requiring intervention.

methodsWe divided the suspected-endemic population living in secure districts into 46 evaluation units (EUs), and used the standardized methodologies of the Global Trachoma Mapping Project. A two-stage cluster-sampling procedure was adopted. In each EU, the goal was to examine at least 1019 children aged 1-9 years by recruiting 649 households; all consenting residents aged ≥ 1 year living in those households were examined. Each participant was examined for trachomatous inflammation-follicular (TF), trachomatous inflammation-intense (TI), and trichiasis.

resultsTwo EUs had data that could not be validated, and were excluded from the analysis. GPS data for three other pairs of EUs suggested that EU divisions were inaccurate; data for each pair were combined within the pair. In the 41 resulting EUs, 29,924 households in 967 clusters were visited, and 104,584 people were examined. The age-adjusted EU-level prevalence of TF in 1-9-year-olds ranged from 0.0% to 23.3%, and the age- and gender-adjusted EU-level prevalence of trichiasis in ≥ 15-year-olds ranged from 0.02% to 1.3%. TF was above the WHO elimination threshold in 16 EUs (39%) and trichiasis was above the WHO elimination threshold in 29 EUs (71%). Women had a higher prevalence of trichiasis than did men in 31 EUs (76%). A higher ratio of trichiasis prevalence in women to trichiasis prevalence in men was associated (p = 0.03) with a higher prevalence of trichiasis at EU level.

conclusionPublic health-level interventions against trachoma are needed in Chad. Over 10,000 people need management of their trichiasis; women account for about two-thirds of this total. The association between a higher ratio of trichiasis prevalence in women to that in men with higher overall trichiasis prevalence needs further investigation.

Indexed as

AdolescentAdultAgedChadChildChild, PreschoolCluster AnalysisCross-Sectional StudiesFemaleHumansInfantMaleMiddle AgedPrevalenceTrachomaTrichiasisChadgenderglobal trachoma mapping projectprevalencetrachomatrichiasis

Identifiers

PMID30806544
PMCPMC6444194
OpenAlexW2908183247

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
Read underepoch 390

Registered trials

None linked

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.