Evidence map›Paper›PMID 41221906›Full record

ArticleThe Cochrane database of systematic reviews2025

Supplementary search methods versus bibliographic database searching to identify studies and study reports.

Chris Cooper, Daniela C Gonçalves-Bradley, Christopher J Rose, Rachel Court, Zahra Premji, Anna Brown, Eve Tomlinson, Jane O'Sullivan, Joe Carroll, Nadine Freitag and 7 more

Abstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in The Cochrane database of systematic reviews, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it
0cells of the map it votes in
0citing 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

0 citing papers in PubMed.

No citing paper in PubMed yet.

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

17 authors.

Chris CooperPopulation Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK.
Daniela C Gonçalves-BradleySymmetron Ltd, London, UK.
Christopher J RoseNorwegian Institute of Public Health, Oslo, Norway.
Rachel CourtCentre for Evidence and Implementation Science, School of Social Policy and Society, University of Birmingham, Birmingham, UK.
Zahra PremjiLibraries, University of Victoria, Victoria, Canada.
Anna BrownCentre for Evidence and Implementation Science, School of Social Policy and Society, University of Birmingham, Birmingham, UK.
Eve TomlinsonPopulation Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK.
Jane O'SullivanPopulation Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK.
Joe CarrollPopulation Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK.
Nadine FreitagDepartment of General Pediatrics, Neonatology and Pediatric Cardiology, Medical Faculty, University Hospital Düsseldorf, Düsseldorf, Germany.
Kerstin NothnagelPopulation Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK.
Annika QuederUniversity Heidelberg, Medical Faculty Heidelberg, Heidelberg, Germany.
Rachel JamesPopulation Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK.
Catalina Lopez ManzanoPopulation Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK.
Samuel HaftelSymmetron Ltd, London, UK.
Satchi GonzalezKing's College London, London, UK.
Ute SchaubergerIndependent Researcher, Glasgow, UK.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectivesThis is a protocol for a Cochrane Review (methodology). The objectives are as follows: To assess the effectiveness and resource requirements of supplementary search methods compared with bibliographic database searching for identifying studies and study reports. The supplementary search methods we will consider are: citation searching; contacting study authors; handsearching; regulatory agency sources and clinical study reports; clinical trials registries; web searching.

Indexed as

Databases, BibliographicInformation Storage and RetrievalSystematic Reviews as TopicHumans

Identifiers

PMID41221906
PMCPMC12606714

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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.