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Published in: BMC Public Health 1/2017

Open Access 01-12-2017 | Research article

What explains the socioeconomic status gap in activity? Educational differences in determinants of physical activity and screentime

Authors: Nelli Hankonen, Matti T. J. Heino, Emilia Kujala, Sini-Tuuli Hynynen, Pilvikki Absetz, Vera Araújo-Soares, Katja Borodulin, Ari Haukkala

Published in: BMC Public Health | Issue 1/2017

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Abstract

Background

Designing evidence-based interventions to address socioeconomic disparities in health and health behaviours requires a better understanding of the specific explanatory mechanisms. We aimed to investigate a comprehensive range of potential theoretical mediators of physical activity (PA) and screen time in different socioeconomic status (SES) groups: a high SES group of high school students, and a low SES group of vocational school students. The COM-B system, including the Theoretical Domains Framework (TDF), was used as a heuristic framework to synthesise different theoretical determinants in this exploratory study.

Methods

Finnish vocational and high school students (N = 659) aged 16–19, responded to a survey assessing psychological, social and environmental determinants of activity (PA and screen time). These determinants are mappable into the COM-B domains: capability, opportunity and motivation. The outcome measures were validated self-report measures for PA and screen time. The statistical analyses included a bootstrapping-based mediation procedure.

Results

Regarding PA, there were SES differences in all of the COM-B domains. For example, vocational school students reported using less self-monitoring of PA, weaker injunctive norms to engage in regular PA, and fewer intentions than high school students. Mediation analyses identified potential mediators of the SES-PA relationship in all of three domains: The most important candidates included self-monitoring (CI95 for b: 0.19–0.47), identity (0.04–0.25) and material resources available (0.01–0.16). However, SES was not related to most determinants of screentime, where there were mainly gender differences. Most determinants were similarly related with both behaviours in both SES groups, indicating no major moderation effect of SES on these relationships.

Conclusions

This study revealed that already in the first years of educational differentiation, levels of key PA determinants differ, contributing to socioeconomic differences in PA. The analyses identified the strongest mediators of the SES-PA association, but additional investigation utilising longitudinal and experimental designs are needed. This study demonstrates the usefulness of combining constructs from various theoretical approaches to better understand the role of distinct mechanisms that underpin socioeconomic health behaviour disparities.
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Metadata
Title
What explains the socioeconomic status gap in activity? Educational differences in determinants of physical activity and screentime
Authors
Nelli Hankonen
Matti T. J. Heino
Emilia Kujala
Sini-Tuuli Hynynen
Pilvikki Absetz
Vera Araújo-Soares
Katja Borodulin
Ari Haukkala
Publication date
01-12-2017
Publisher
BioMed Central
Published in
BMC Public Health / Issue 1/2017
Electronic ISSN: 1471-2458
DOI
https://doi.org/10.1186/s12889-016-3880-5

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