Evidence map›Paper›PMID 32216794›Full record

SynthesisBMC medicine2020

Pharmacotherapy for hypertension in Sub-Saharan Africa: a systematic review and network meta-analysis.

Anna Seeley, Josephine Prynn, Rachel Perera, Rebecca Street, Daniel Davis, Anthony O Etyang

Open access · goldAbstract readNetwork Meta-AnalysisSystematic Review
In one paragraph

Synthesis in BMC medicine, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed, 3 pooled it
1.6field-weighted citation impact, top 14% 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

17 citing papers in PubMed, 3 syntheses or guidelines pooled it, 23 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Pooled it
  4. Exploring the knowledge and practice of calcium channel blocker overdose management among South African Emergency Medicine doctors.African journal of emergency medicine : Revue africaine de la medecine d'urgence · 2026
    Article
  5. Review
  6. Article
  7. Article
  8. Article
  9. Genetic Variation inJournal of personalized medicine · 2024
    Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Review
  17. 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

6 authors at 3 institutions in 2 countries.

Anna SeeleyMedical Research Council Unit Lifelong Health and Ageing at UCL, Department of Population Science and Experimental Medicine, University College London, London, UK. anna.seeley@nhs.net.
Josephine PrynnUniversity College London, London, UK.
Rachel PereraMedical Research Council Unit Lifelong Health and Ageing at UCL, Department of Population Science and Experimental Medicine, University College London, London, UK.
Rebecca StreetMedical Research Council Unit Lifelong Health and Ageing at UCL, Department of Population Science and Experimental Medicine, University College London, London, UK.
Daniel DavisMedical Research Council Unit Lifelong Health and Ageing at UCL, Department of Population Science and Experimental Medicine, University College London, London, UK.
Anthony O EtyangDepartment of Epidemiology and Demography, KEMRI Wellcome Trust Research Programme, Kilifi, Kenya.
University College London · GBMRC Unit for Lifelong Health and Ageing · GBKenya Medical Research Institute · KE

Funding

Wellcome Trust 107467/Z/15/Z
6 · The paper itself

Abstract

backgroundThe highest burden of hypertension is found in Sub-Saharan Africa (SSA) with a threefold greater mortality from stroke and other associated diseases. Ethnicity is known to influence the response to antihypertensives, especially in black populations living in North America and Europe. We sought to outline the impact of all commonly used pharmacological agents on both blood pressure reduction and cardiovascular morbidity and mortality in SSA.

methodsWe used similar criteria to previous large meta-analyses of blood pressure agents but restricted results to populations in SSA. Quality of evidence was assessed using a risk of bias tool. Network meta-analysis with random effects was used to compare the effects across interventions and meta-regression to explore participant heterogeneity.

resultsThirty-two studies of 2860 participants were identified. Most were small studies from single, urban centres. Compared with placebo, any pharmacotherapy lowered SBP/DBP by 8.51/8.04 mmHg, and calcium channel blockers (CCBs) were the most efficacious first-line agent with 18.46/11.6 mmHg reduction. Fewer studies assessing combination therapy were available, but there was a trend towards superiority for CCBs plus ACE inhibitors or diuretics compared to other combinations. No studies examined the effect of antihypertensive therapy on morbidity or mortality outcomes.

conclusionEvidence broadly supports current guidelines and provides a clear rationale for promoting CCBs as first-line agents and early initiation of combination therapy. However, there is a clear requirement for more evidence to provide a nuanced understanding of stroke and other cardiovascular disease prevention amongst diverse populations on the continent.

trial registrationPROSPERO, CRD42019122490. This review was registered in January 2019.

Indexed as

Antihypertensive AgentsHypertensionAfrica South of the SaharaHumansMiddle AgedAntihypertensive AgentsAfricaAntihypertensive agentsCombination therapyHypertensionHypertension/therapyRaised blood pressureSub-Saharan Africa

Identifiers

PMID32216794
PMCPMC7099775
OpenAlexW3013905258

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.