Compositional data analysis in time-use epidemiology: what, why, how
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Date
2020
Authors
Dumuid, D.
Pedišić, Ž.
Palarea Albaladejo, J.
Martín Fernández, J.A.
Hron, K.
Olds, T.
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International Journal of Environmental Research and Public Health, 2020; 17(7):1-17
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Abstract
In recent years, the focus of activity behavior research has shifted away from univariate paradigms (e.g., physical activity, sedentary behavior and sleep) to a 24-hour time-use paradigm that integrates all daily activity behaviors. Behaviors are analyzed relative to each other, rather than as individual entities. Compositional data analysis (CoDA) is increasingly used for the analysis of time-use data because it is intended for data that convey relative information. While CoDA has brought new understanding of how time use is associated with health, it has also raised challenges in how this methodology is applied, and how the findings are interpreted. In this paper we provide a brief overview of CoDA for time-use data, summarize current CoDA research in time-use epidemiology and discuss challenges and future directions. We use 24-hour time-use diary data from Wave 6of the Longitudinal Study of Australian Children (birth cohort, n = 3228, aged 10.9 ± 0.3 years)to demonstrate descriptive analyses of time-use compositions and how to explore the relationship between daily time use (sleep, sedentary behavior and physical activity) and a health outcome (inthis example, adiposity). We illustrate how to comprehensively interpret the CoDA findings in a meaningful way.
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Data source: Supplementary material, https://doi.org/10.3390/ijerph17072220
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Copyright 2020 by the authors This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/)