Cited by 404Statistical Methods and Bayesian InferenceStatistical Methods in Clinical TrialsAdvanced Causal Inference Techniques

Handling drop‐out in longitudinal studies

Hogan, Joseph W., Roy, Jason, Korkontzelou, Christina·2004·Statistics in Medicine

Abstract

Drop‐out is a prevalent complication in the analysis of data from longitudinal studies, and remains an active area of research for statisticians and other quantitative methodologists. This tutorial is designed to synthesize and illustrate the broad array of techniques that are used to address outcome‐related drop‐out, with emphasis on regression‐based methods. We begin with a review of important assumptions underlying likelihood‐based and semi‐parametric models, followed by an overview of models and methods used to draw inferences from incomplete longitudinal data. The majority of the tutorial is devoted to detailed analysis of two studies with substantial rates of drop‐out, designed to illustrate the use of effective methods that are relatively easy to apply: in the first example, we use both semi‐parametric and fully parametric models to analyse repeated binary responses from a clinical trial of smoking cessation interventions; in the second, pattern mixture models are used to analyse longitudinal CD4 counts from an observational cohort study of HIV‐infected women. In each example, we describe exploratory analyses, model formulation, estimation methodology and interpretation of results. Analyses of incomplete data requires making unverifiable assumptions, and these are discussed in detail within the context of each application. Relevant SAS code is provided. Copyright © 2004 John Wiley & Sons, Ltd.

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Crossref · 10.1002/sim.1728

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Authors
Hogan, J. W., Roy, J., & Korkontzelou, C.
Affiliations
Brown University (US)
Corresponding author
Hogan, Joseph W.
Venue
Statistics in Medicine
Publisher
Wiley
Published
2004-04-06
Volume
23
Issue
9
Pages
1455-1497
ISSN
  • 0277-6715 (ISSN-L)
  • 1097-0258
OpenAlex
W2154534198
Cited by
404
References
111
Citations by year
2026: 11 · 2025: 8 · 2024: 10 · 2023: 6 · 2022: 12 · 2021: 7 · 2020: 13 · 2019: 16 · 2018: 12 · 2017: 32 · 2016: 23 · 2015: 31 · 2014: 19 · 2013: 27 · 2012: 19
FWCI
3.43
Type
journal article
Language
en
Open access
closed
Locations
  • Statistics in Medicine (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Centers for Disease Control and Prevention (U64/CCU506831, U64\CCU306802, U64\CCU106795, U64\CCU206798)
  • National Cancer Institute (R01CA077249, R01-CA77249)
  • National Institute of Allergy and Infectious Diseases (P30-AI 42853, R01-AI50505, R01AI050505, P30AI042853)
Topics
  • Physical Sciences › Mathematics › Statistics and Probability › Statistical Methods and Bayesian Inference
  • Physical Sciences › Mathematics › Statistics and Probability › Statistical Methods in Clinical Trials
  • Physical Sciences › Mathematics › Statistics and Probability › Advanced Causal Inference Techniques
Keywords
dropout, longitudinal data, missing data, pattern-mixture models, semiparametric models, likelihood-based models, smoking cessation interventions, women living with HIV, CD4 count
MeSH terms
Biometry, Female, Humans, Longitudinal Studies, Patient Dropouts, Regression Analysis, Models, Statistical, HIV Infections, Smoking Cessation

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