Evidence map›Paper›PMID 22344923›Full record

ArticleStatistics in medicine2012

Longitudinal structural mixed models for the analysis of surgical trials with noncompliance.

Colleen M Sitlani, Patrick J Heagerty, Emily A Blood, Tor D Tosteson

Abstract read
In one paragraph

Article in Statistics in medicine, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.

0numbers the graph read from it
0cells of the map it votes in
15citing 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

15 citing papers in PubMed.

  1. Trial
  2. Trial
  3. Trial
  4. Trial
  5. Article
  6. Article
  7. Article
  8. Review
  9. Linear mixed models with endogenous covariates: modeling sequential treatment effects with application to a mobile health study.Statistical science : a review journal of the Institute of Mathematical Statistics · 2020
    Article
  10. Article
  11. Article
  12. Article
  13. TO THE EDITOR.Spine · 2017
    Article
  14. Article
  15. 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

4 authors.

Colleen M SitlaniDepartment of Biostatistics, University of Washington, F-600 Health Sciences Building, Box 357232, Seattle, WA 98195, USA. csitlani@u.washington.edu
Patrick J Heagerty
Emily A Blood
Tor D Tosteson

Funding

Translational Engineering in Cancer (TEC)P30CA023108 · NCI · DARTMOUTH COLLEGE · PI Steven D Leach · 1985 to 2026
$91.3M
INSTITUTE FOR TRANSLATIONAL HEALTH SCIENCE (UL1): BPCAUL1RR025014 · NCRR · UNIVERSITY OF WASHINGTON · PI DISIS, MARY L. · 2007 to 2011
$51.5M
LOW BACK PAIN--A MULTICENTER RANDOMIZED TRIALU01AR045444 · NIAMS · DARTMOUTH COLLEGE · PI WEINSTEIN, JAMES N · 1999 to 2013
$20.8M
Prognostic Value of Lumbar Spine MRIP60AR048094 · NIAMS · DARTMOUTH COLLEGE · PI TOSTESON, TOR D. · 2003 to 2007
$6.2M
Statistical Methods for Longitudinal StudiesR01HL072966 · NHLBI · UNIVERSITY OF WASHINGTON · PI HEAGERTY, PATRICK J · 2003 to 2014
$1.9M
CARDIOVASCULAR BIOSTATISTICS TRAININGT32HL007183 · NHLBI · UNIVERSITY OF WASHINGTON · PI RICE, KENNETH M. · 1985 to 2011
$1.8M
NCI NIH HHS P30 CA023108NCRR NIH HHS UL1 RR025014NHLBI NIH HHS R01 HL072966NHLBI NIH HHS T32 HL007183NHLBI NIH HHS T32 HL07183NIAMS NIH HHS P60 AR04809NIAMS NIH HHS P60 AR048094NIAMS NIH HHS U01 AR045444NIAMS NIH HHS U01 AR45444
6 · The paper itself

Abstract

Patient noncompliance complicates the analysis of many randomized trials seeking to evaluate the effect of surgical intervention as compared with a nonsurgical treatment. If selection for treatment depends on intermediate patient characteristics or outcomes, then 'as-treated' analyses may be biased for the estimation of causal effects. Therefore, the selection mechanism for treatment and/or compliance should be carefully considered when conducting analysis of surgical trials. We compare the performance of alternative methods when endogenous processes lead to patient crossover. We adopt an underlying longitudinal structural mixed model that is a natural example of a structural nested model. Likelihood-based methods are not typically used in this context; however, we show that standard linear mixed models will be valid under selection mechanisms that depend only on past covariate and outcome history. If there are underlying patient characteristics that influence selection, then likelihood methods can be extended via maximization of the joint likelihood of exposure and outcomes. Semi-parametric causal estimation methods such as marginal structural models, g-estimation, and instrumental variable approaches can also be valid, and we both review and evaluate their implementation in this setting. The assumptions required for valid estimation vary across approaches; thus, the choice of methods for analysis should be driven by which outcome and selection assumptions are plausible.

Indexed as

Models, StatisticalPatient ComplianceSurgical Procedures, OperativeCross-Over StudiesHumansIntervertebral Disc DisplacementLikelihood FunctionsLongitudinal StudiesPatient SelectionRandomized Controlled Trials as Topic

Identifiers

PMID22344923
PMCPMC3876882

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.