Full Citation
Title: Factor Analysis Test of an Ecological Model of Physical Activity Correlates...: Discovery Service for UNIV OF MINNESOTA - TWIN CITIES
Citation Type: Journal Article
Publication Year: 2019
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DOI: : https://doi.org/10.5993/AJHB.43.1.6
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Abstract: The fit of measured variables into a social-ecological model of correlates of physical activity is rarely tested. In this study, we examined the factor structure of correlates of moderate/vigorous physical activity (MVPA) within a hypothesized social-ecological model. Methods: We measured 46 possible personal, social and environmental correlates of MVPA in 2779 adolescents participating in the Project EAT-2010 study. Confirmatory (CFA) and exploratory factor analyses (EFA) were used to determine the factor structure. Associations of factor scores with self-reported MVPA were calculated with linear regression. Results: A 6-factor CFA model did not show adequate fit. Eight factors were identified using EFA (Root Mean Square Error [RMSEA] 90% CI: 0.053 to 0.055; CFI = 0.82). A factor representing the mix of personal and social correlates showed the strongest association with MVPA. Conclusions: The 8-factor model supports independent clustering of possible environmental correlates of MVPA, but indicates that social and personal correlates may not cluster independently. The factor most strongly correlated with MVPA represented a mix of personal and social correlates. Future work will be needed to better understand how mechanisms for developing physical activity work within and across levels of the social-ecological framework.
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Authors: Miller, Jonathan M.; Wolfson, Julian; Laska, Melissa Nelson; Nelson, Toben F; Pereira, Mark A.; Neumark-Sztainer, Dianne
Periodical (Full): Am J Health Behav
Issue: 1
Volume: 43
Pages: 57-75
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