Evidence map›Paper›PMID 35774016›Full record

ArticleStatistics in medicine2022

Analysis of stepped wedge cluster randomized trials in the presence of a time-varying treatment effect.

Avi Kenny, Emily C Voldal, Fan Xia, Patrick J Heagerty, James P Hughes

Abstract read
In one paragraph

Article in Statistics in medicine, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 46 papers.

0numbers the graph read from it
0cells of the map it votes in
46citing 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

46 citing papers in PubMed.

  1. Trial
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  3. Using the NIH Research Methods Resources Website.Prevention science : the official journal of the Society for Prevention Research · 2026
    Article
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  6. Evaluation of injury prevention interventions using the stepped wedge cluster randomised trial design: key considerations.Injury prevention : journal of the International Society for Child and Adolescent Injury Prevention · 2026
    Article
  7. Article
  8. Article
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  10. Model-robust standardization in stepped wedge cluster randomized trials.Journal of the Royal Statistical Society. Series A, (Statistics in Society) · 2026
    Article
  11. Article
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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

5 authors.

Avi KennyDepartment of Biostatistics, University of Washington, Seattle, Washington, USA.ORCID 0000-0002-9465-7307
Emily C VoldalDepartment of Biostatistics, University of Washington, Seattle, Washington, USA.ORCID 0000-0002-6286-3982
Fan XiaDepartment of Biostatistics, University of Washington, Seattle, Washington, USA.
Patrick J HeagertyDepartment of Biostatistics, University of Washington, Seattle, Washington, USA.
James P HughesDepartment of Biostatistics, University of Washington, Seattle, Washington, USA.ORCID 0000-0001-5034-3157

Funding

Transform Dissemination and Implementation Science in CTSA ProgramsUL1TR002319 · NCATS · UNIVERSITY OF WASHINGTON · PI John K. Amory · 2017 to 2026
$100.0M
STATISTICAL ISSUES IN AIDS RESEARCHR37AI029168 · NIAID · UNIVERSITY OF WASHINGTON · PI JAMES P HUGHES · 1999 to 2026
$9.8M
STATISTICAL ISSUES IN AIDS RESEARCHR01AI029168 · NIAID · UNIVERSITY OF WASHINGTON · PI HUGHES, JAMES P · 1989 to 2018
$5.3M
NCATS NIH HHS UL1 TR002319NIAID NIH HHS R01 AI029168NIAID NIH HHS R37 AI029168NIH HHS AI29168NIH HHS UL1 TR002319
6 · The paper itself

Abstract

Stepped wedge cluster randomized controlled trials are typically analyzed using models that assume the full effect of the treatment is achieved instantaneously. We provide an analytical framework for scenarios in which the treatment effect varies as a function of exposure time (time since the start of treatment) and define the "effect curve" as the magnitude of the treatment effect on the linear predictor scale as a function of exposure time. The "time-averaged treatment effect" (TATE) and "long-term treatment effect" (LTE) are summaries of this curve. We analytically derive the expectation of the estimator

Indexed as

Research DesignCausalityCluster AnalysisComputer SimulationHumansRandomized Controlled Trials as TopicSample Sizecluster randomized trialmodel misspecificationstepped wedgetime-varying treatment effect

Identifiers

PMID35774016
PMCPMC9481733

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.