Evidence map›Paper›PMID 40701797›Full record

ArticleBMJ quality & safety2025

Grand rounds in methodology: improving the design of staggered implementation cluster randomised trials.

Samuel I Watson, Richard Hooper

Abstract read
In one paragraph

Article in BMJ quality & safety, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing 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

1 citing paper in PubMed.

  1. 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

2 authors.

Samuel I WatsonDepartment of Applied Health Sciences, University of Birmingham, Birmingham, UK s.i.watson@bham.ac.uk.ORCID http://orcid.org/0000-0002-8972-769X
Richard HooperWolfson Institute of Population Health, Queen Mary University of London, London, UK.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The stepped-wedge cluster randomised trial is a popular design in implementation and health services research. All clusters, such as clinics or hospitals, start in the control state, and gradually switch over to treatment in a random order until all clusters have received the intervention. The design allows for the incorporation of an experiment into the gradual roll-out of an intervention across clusters. However, the traditional stepped-wedge layout may not be the best choice in many scenarios. In this article, we discuss modifications to the stepped-wedge design that maintain a staggered roll-out, but which may improve some key characteristics. We consider improving the timing of implementation periods, reducing the volume of data collection and allowing for the recruitment of clusters over the course of the trial.

Indexed as

Randomized Controlled Trials as TopicResearch DesignCluster AnalysisHealth Services ResearchHumanscluster trialsevaluation methodologyhealth services researchimplementation sciencestatistics

Identifiers

PMID40701797
PMCPMC12418559

What OpenQuestion holds

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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.