Evidence map›Paper›PMID 31860969›Full record

SynthesisMedicine2019

The role of hydroxyurea to prevent silent stroke in sickle cell disease: Systematic review and meta-analysis.

Carla Hasson, Lisa Veling, Juan Rico, Rahul Mhaskar

Abstract readMeta-AnalysisSystematic Review
In one paragraph

Synthesis in Medicine, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed
–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

12 citing papers in PubMed.

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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

4 authors.

Carla HassonMorsani College of Medicine.
Lisa VelingMorsani College of Medicine.
Juan RicoDepartment of Pediatrics, Morsani College of Medicine, University of South Florida.
Rahul MhaskarDepartment of Internal Medicine, Morsani College of Medicine, University of South Florida, Tampa, FL.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundChronic blood transfusions are standard of care for stroke prevention in sickle cell disease but is not cost effective and not without risks. Hydroxyurea has emerged as an option in the prevention of silent stroke in sickle cell disease.

objectiveTo evaluate the role of hydroxyurea in preventing silent strokes in a systematic review by adhering to the Cochrane guidelines.

methodsPubMed, EMBASE, Web of Science Core Collection, and Cochrane Central Register of Controlled Trials were searched for the related articles. Eligibility criteria included randomized controlled trials (RCTs) comparing the use of hydroxyurea vs blood transfusions and observational studies evaluating the role of hydroxyurea to prevent stroke and silent stroke in patients with sickle cell anemia or sickle cell β thalassemia. The meta-analysis was conducted using STATA software version 13.

resultsWe included 10 single arm observational studies with 361 participants, and one RCT study with 60 participants receiving hydroxyurea, respectively. There were no deaths attributed to hydroxyurea. The results revealed that 1% (95% CIs 0.0 to 0.05) of patients receiving hydroxyurea had stroke. 18% (95% CIs 0.03 to 0.4) of the hydroxyurea patients had silent stroke. 24% (95% CIs 0.02 to 0.57) of the hydroxyurea patients had adverse events attributed to hydroxyurea.

conclusionOur findings suggest that hydroxyurea is safe and may prevent silent stroke and stroke in sickle cell disease. More high-quality studies including RCTs are needed.

Indexed as

Anemia, Sickle CellAntisickling AgentsBlood TransfusionHumansHydroxyureaStrokeAntisickling AgentsHydroxyurea

Identifiers

PMID31860969
PMCPMC6940152

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.