Evidence map›Paper›PMID 33555657›Full record

ArticleActa ophthalmologica2021

Differences in clinical presentation of primary open-angle glaucoma between African and European populations.

Pieter W M Bonnemaijer, Valeria Lo Faro, Anna J Sanyiwa, Hassan G Hassan, Colin Cook, GIGA study group, Suzanne Van de Laar, Hans G Lemij, Caroline C W Klaver, Nomdo M Jansonius and 1 more

Open access · hybridAbstract readMulticenter Study
In one paragraph

Article in Acta ophthalmologica, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed, 2 pooled it
2.6field-weighted citation impact, top 11% 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

13 citing papers in PubMed, 2 syntheses or guidelines pooled it, 20 citations in OpenAlex.

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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

11 authors at 6 institutions in 5 countries.

Pieter W M BonnemaijerDepartment of Ophthalmology, Erasmus MC, Rotterdam, The Netherlands.ORCID https://orcid.org/0000-0001-5154-6765
Valeria Lo FaroDepartment of Ophthalmology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands.ORCID https://orcid.org/0000-0003-4931-7327
Anna J SanyiwaDepartment of Ophthalmology Muhibili, University of Health and Allied Sciences, Muhimbili National Hospital, Dar es Salaam, Tanzania.
Hassan G HassanDepartment of Ophthalmology, Comprehensive Community Based Rehabilitation in Tanzania (CCBRT) Hospital, Dar es Salaam, Tanzania.
Colin CookDivision of Ophthalmology, University of Cape Town, Cape Town, South Africa.
GIGA study group
Suzanne Van de LaarDepartment of Ophthalmology, Univerity Medical Center Utrecht, Utrecht, The Netherlands.
Hans G LemijThe Rotterdam Eye Hospital, Rotterdam, The Netherlands.ORCID https://orcid.org/0000-0001-8508-8985
Caroline C W KlaverDepartment of Ophthalmology, Erasmus MC, Rotterdam, The Netherlands.ORCID https://orcid.org/0000-0002-2355-5258
Nomdo M JansoniusDepartment of Ophthalmology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands.ORCID https://orcid.org/0000-0002-6495-6568
Alberta A H J ThiadensDepartment of Ophthalmology, Erasmus MC, Rotterdam, The Netherlands.ORCID https://orcid.org/0000-0002-4911-9462
University Medical Center Groningen · NLErasmus MC · NLUniversity Medical Center Utrecht · NLMuhimbili University of Health and Allied Sciences · TZRadboud University Nijmegen · NLUniversity of Cape Town · ZA

Funding

Algemene Nederlandse Vereniging ter voorkoming van BlindheidBrightFocus Foundation G2015084H2020 Marie Skłodowska-Curie Actions 675033Landelijke Stichting voor Blinden en SlechtziendenProf. dr. Henkes stichtingRotterdamse Stichting BlindenbelangenStichting Beheer het SchildStichting Combined Ophthalmic Research Rotterdam (CORR)Stichting GlaucoomfondsUitZicht
6 · The paper itself

Abstract

purposePrimary open-angle glaucoma (POAG) has been reported to occur more frequently in Africans, and to follow a more severe course compared to Europeans. We aimed to describe characteristics of POAG presentation and treatment across three ethnic groups from Africa and one from Europe.

methodsWe ascertained 151 POAG patients from South African Coloured (SAC) and 94 South African Black (SAB) ethnicity from a university hospital in South Africa. In Tanzania, 310 patients were recruited from a university hospital and a referral hospital. In the Netherlands, 241 patients of European ancestry were included. All patients were over 35 years old and had undergone an extensive ophthalmic examination. Patients were diagnosed according to the ISGEO criteria. A biogeographic ancestry analysis was performed to estimate the proportion of genetic African ancestry (GAA).

resultsThe biogeographic ancestry analysis showed that the median proportion of GAA was 97.6% in Tanzanian, 100% in SAB, 34.2% in SAC and 1.5% in Dutch participants. Clinical characteristics at presentation for Tanzanians, SAB, SAC and Dutch participants, respectively: mean age: 63, 57, 66, 70 years (p < 0.001); visual acuity in the worse eye: 1.78, 1.78, 0.3, 0.3 LogMAR (p < 0.001); maximum intraocular pressure of both eyes: 36, 34, 29, 29 mmHg (p

conclusionIn this multi-ethnic comparative study, Sub-Saharan Africans present at a younger age with lower visual acuity, higher IOP, larger VCDR, than SAC and Dutch participants. This indicates the more progressive and destructive course in Sub-Saharan Africans.

Indexed as

Visual AcuityAdultAfricaAgedEuropeFemaleFollow-Up StudiesGlaucoma, Open-AngleGonioscopyHumansIntraocular PressureMaleMiddle AgedRetrospective StudiesSlit Lamp MicroscopyAfricaEuropeglaucomaprimary open-angle glaucomaSouth AfricaTanzania

Identifiers

PMID33555657
PMCPMC8596541
OpenAlexW3129116878

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.