Evidence map›Paper›PMID 29205454›Full record

ArticleStatistics in medicine2018

Joint mixed-effects models for causal inference with longitudinal data.

Michelle Shardell, Luigi Ferrucci

Abstract read
In one paragraph

Article in Statistics in medicine, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.

0numbers the graph read from it
0cells of the map it votes in
22citing 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

22 citing papers in PubMed.

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  17. Bayesian semi-parametric G-computation for causal inference in a cohort study with MNAR dropout and death.Journal of the Royal Statistical Society. Series C, Applied statistics · 2021
    Article
  18. Article
  19. 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
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  20. 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.

Michelle ShardellNational Institute on Aging, 3001 S. Hanover Street, Baltimore, Maryland 21225, USA.ORCID 0000-0002-5283-2082
Luigi FerrucciNational Institute on Aging, 3001 S. Hanover Street, Baltimore, Maryland 21225, USA.

Funding

Statistical methods for vitamin D targets for functional outcomes in older adultsR01AG048069 · NIA · UNIVERSITY OF MARYLAND BALTIMORE · PI SHARDELL, MICHELLE DENISE · 2015 to 2025
$4.3M
Intramural NIH HHS Z99 AG999999NIA NIH HHS R01 AG048069
6 · The paper itself

Abstract

Causal inference with observational longitudinal data and time-varying exposures is complicated due to the potential for time-dependent confounding and unmeasured confounding. Most causal inference methods that handle time-dependent confounding rely on either the assumption of no unmeasured confounders or the availability of an unconfounded variable that is associated with the exposure (eg, an instrumental variable). Furthermore, when data are incomplete, validity of many methods often depends on the assumption of missing at random. We propose an approach that combines a parametric joint mixed-effects model for the study outcome and the exposure with g-computation to identify and estimate causal effects in the presence of time-dependent confounding and unmeasured confounding. G-computation can estimate participant-specific or population-average causal effects using parameters of the joint model. The joint model is a type of shared parameter model where the outcome and exposure-selection models share common random effect(s). We also extend the joint model to handle missing data and truncation by death when missingness is possibly not at random. We evaluate the performance of the proposed method using simulation studies and compare the method to both linear mixed- and fixed-effects models combined with g-computation as well as to targeted maximum likelihood estimation. We apply the method to an epidemiologic study of vitamin D and depressive symptoms in older adults and include code using SAS PROC NLMIXED software to enhance the accessibility of the method to applied researchers.

Indexed as

CausalityLinear ModelsLongitudinal StudiesAgedComputer SimulationConfounding Factors, EpidemiologicData Interpretation, StatisticalDepressionHumansItalyTime FactorsVitamin DVitamin Dcausal inferencelongitudinal datamissing not at randomtime-dependent confoundingunmeasured confounding

Identifiers

PMID29205454
PMCPMC5799019

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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.