Evidence map›Paper›PMID 29740502›Full record

SynthesisJournal of global health2018

Estimating the incidence of breast cancer in Africa: a systematic review and meta-analysis.

Davies Adeloye, Olaperi Y Sowunmi, Wura Jacobs, Rotimi A David, Adeyemi A Adeosun, Ann O Amuta, Sanjay Misra, Muktar Gadanya, Asa Auta, Michael O Harhay and 1 more

Abstract readMeta-AnalysisSystematic Review
In one paragraph

Synthesis in Journal of global health, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 84 papers, 5 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
84citing papers in PubMed, 5 pooled it
–field-weighted citation impact
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

84 citing papers in PubMed, 5 syntheses or guidelines pooled it.

  1. Pooled it
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  4. Estimate of the incidence of bladder cancer in Africa: A systematic review and Bayesian meta-analysis.International journal of urology : official journal of the Japanese Urological Association · 2019
    Pooled it
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  11. Screening for distress among metastatic breast cancer patients at a tertiary cancer center in Southwest Nigeria: Using the NCCN distress thermometer.Supportive care in cancer : official journal of the Multinational Association of Supportive Care in Cancer · 2026
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24 more citing papers are in PubMed but not listed here.

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.

Davies AdeloyeNigerian Urban Reproductive Health Initiative, Abuja, Nigeria.
Olaperi Y SowunmiComputer and Information Sciences, Covenant University, Ota, Ogun State, Nigeria.
Wura JacobsDepartment of Health Science, California State University, Fullerton, California, USA.
Rotimi A DavidDepartment of Urology, Morriston Hospital, Abertawe Bro Morgannwg University Health Board, Swansea, UK.
Adeyemi A AdeosunHealth Initiative Department, National Jewish Hospital, Denver, Colorado, USA.
Ann O AmutaDepartment of Health Studies, Texas Woman's University, Denton, Texas, USA.
Sanjay MisraDepartment of Computer Engineering, Atilim University, Turkey.
Muktar GadanyaDepartment of Community Medicine, Aminu Kano Teaching Hospital, Bayero University, Kano, Nigeria.
Asa AutaSchool of Pharmacy and Biomedical Sciences, University of Central Lancashire, Fylde Road, Preston, UK.
Michael O HarhayDepartment of Biostatistics, Epidemiology and Informatics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
Kit Yee ChanCentre for Global Health Research and the World Health Organization Collaborating Centre for Population Health Research and Training, Usher Institute, University of Edinburgh, Scontland, UK.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundBreast cancer is estimated to be the most common cancer worldwide. We sought to assemble publicly available data from Africa to provide estimates of the incidence of breast cancer on the continent.

methodsA systematic search of Medline, EMBASE, Global Health and African Journals Online (AJOL) was conducted. We included population- or hospital-based registry studies on breast cancer conducted in Africa, and providing estimates of the crude incidence of breast cancer among women. A random effects meta-analysis was employed to determine the pooled incidence of breast cancer across studies.

resultsThe literature search returned 4648 records, with 41 studies conducted across 54 study sites in 22 African countries selected. We observed important variations in reported cancer incidence between population- and hospital-based cancer registries. The overall pooled crude incidence of breast cancer from population-based registries was 24.5 per 100 000 person years (95% confidence interval (CI) 20.1-28.9). The incidence in North Africa was higher at 29.3 per 100 000 (95% CI 20.0-38.7) than Sub-Saharan Africa (SSA) at 22.4 per 100 000 (95% CI 17.2-28.0). In hospital-based registries, the overall pooled crude incidence rate was estimated at 23.6 per 100 000 (95% CI 18.5-28.7). SSA and Northern Africa had relatively comparable rates at 24.0 per 100 000 (95% CI 17.5-30.4) and 23.2 per 100 000 (95% CI 6.6-39.7), respectively. Across both registries, incidence rates increased considerably between 2000 and 2015.

conclusionsThe available evidence suggests a growing incidence of breast cancer in Africa. The representativeness of these estimates is uncertain due to the paucity of data in several countries and calendar years, as well as inconsistency in data collation and quality across existing cancer registries.

Indexed as

AfricaBreast NeoplasmsFemaleHumansIncidenceRegistries

Identifiers

PMID29740502
PMCPMC5903682

What OpenQuestion holds

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Registered trials

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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.