Evidence map›Paper›PMID 28783884›Full record

ArticleStatistics in medicine2017

A pattern-mixture model approach for handling missing continuous outcome data in longitudinal cluster randomized trials.

Mallorie H Fiero, Chiu-Hsieh Hsu, Melanie L Bell

Abstract read
In one paragraph

Article in Statistics in medicine, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.

0numbers the graph read from it
0cells of the map it votes in
17citing 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

17 citing papers in PubMed.

  1. Trial
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  4. Change ofFrontiers in psychology · 2026
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  10. The effect of social care nurses on health related quality of life in patients with advanced cancer: A non-randomized, multicenter, controlled trial.Quality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation · 2024
    Article
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  14. Autopopulus: A Novel Framework for Autoencoder Imputation on Large Clinical Datasets.Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference · 2021
    Article
  15. Intention-to-treat analysis when only a baseline value is available.Contemporary clinical trials communications · 2020
    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

3 authors.

Mallorie H FieroOffice of Biostatistics, Center for Drug Evaluation and Research, U.S. Food & Drug Administration, Silver Spring, 20993, Maryland, USA.ORCID http://orcid.org/0000-0001-5536-116X
Chiu-Hsieh HsuDepartment of Epidemiology and Biostatistics, Mel and Enid Zuckerman College of Public Health, University of Arizona, Tucson, 85724, Arizona, USA.
Melanie L BellDepartment of Epidemiology and Biostatistics, Mel and Enid Zuckerman College of Public Health, University of Arizona, Tucson, 85724, Arizona, USA.ORCID http://orcid.org/0000-0003-4821-4094

Funding

VITAMIN AP30CA023074 · NCI · UNIVERSITY OF ARIZONA · PI Dan Theodorescu · 1985 to 2026
$110.2M
NCI NIH HHS P30 CA023074
6 · The paper itself

Abstract

We extend the pattern-mixture approach to handle missing continuous outcome data in longitudinal cluster randomized trials, which randomize groups of individuals to treatment arms, rather than the individuals themselves. Individuals who drop out at the same time point are grouped into the same dropout pattern. We approach extrapolation of the pattern-mixture model by applying multilevel multiple imputation, which imputes missing values while appropriately accounting for the hierarchical data structure found in cluster randomized trials. To assess parameters of interest under various missing data assumptions, imputed values are multiplied by a sensitivity parameter, k, which increases or decreases imputed values. Using simulated data, we show that estimates of parameters of interest can vary widely under differing missing data assumptions. We conduct a sensitivity analysis using real data from a cluster randomized trial by increasing k until the treatment effect inference changes. By performing a sensitivity analysis for missing data, researchers can assess whether certain missing data assumptions are reasonable for their cluster randomized trial.

Indexed as

Multilevel AnalysisPatient DropoutsBiasComputer SimulationData Interpretation, StatisticalHumansLongitudinal StudiesMonte Carlo MethodRandomized Controlled Trials as Topiccluster randomized trialsmissing datamultiple imputationpattern-mixture model

Identifiers

PMID28783884
PMCPMC5628153

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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.