alexa Comparison of population-averaged and subject-specific approaches for analyzing repeated binary outcomes.
Infectious Diseases

Infectious Diseases

Journal of AIDS & Clinical Research

Author(s): Hu FB, Goldberg J, Hedeker D, Flay BR, Pentz MA, Hu FB, Goldberg J, Hedeker D, Flay BR, Pentz MA

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Abstract Several approaches have been proposed to model binary outcomes that arise from longitudinal studies. Most of the approaches can be grouped into two classes: the population-averaged and subject-specific approaches. The generalized estimating equations (GEE) method is commonly used to estimate population-averaged effects, while random-effects logistic models can be used to estimate subject-specific effects. However, it is not clear to many epidemiologists how these two methods relate to one another or how these methods relate to more traditional stratified analysis and standard logistic models. The authors address these issues in the context of a longitudinal smoking prevention trial, the Midwestern Prevention Project. In particular, the authors compare results from stratified analysis, standard logistic models, conditional logistic models, the GEE models, and random-effects models by analyzing a binary outcome from two and seven repeated measurements, respectively. In the comparison, the authors focus on the interpretation of both time-varying and time-invariant covariates under different models. Implications of these methods for epidemiologic research are discussed.
This article was published in Am J Epidemiol and referenced in Journal of AIDS & Clinical Research

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