aa-44 - Health Education & Behavior...

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http://heb.sagepub.com/ Behavior http://heb.sagepub.com/content/37/2/170 The online version of this article can be found at: DOI: 10.1177/1090198109332599 2010 37: 170 originally published online 8 June 2009 Health Educ Behav Ronald C. Plotnikoff, Michael A. Pickering, Laura M. Flaman and John C. Spence Environment and Physical Activity: A Longitudinal Mediation Analysis The Role of Self-Efficacy on the Relationship Between the Workplace Published by: http://www.sagepublications.com On behalf of: Society for Public Health Education can be found at: Additional services and information for http://heb.sagepub.com/cgi/alerts Email Alerts: http://heb.sagepub.com/subscriptions Subscriptions: http://www.sagepub.com/journalsReprints.nav Reprints: http://www.sagepub.com/journalsPermissions.nav Permissions: http://heb.sagepub.com/content/37/2/170.refs.html Citations: at BRIGHAM YOUNG UNIV on September 13, 2010 heb.sagepub.com Downloaded from
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170 Ronald C. Plotnikoff, School of Public Health, Faculty of Physical Education and Recreation, and Alberta Centre for Active Living, University of Alberta, Canada. Michael A. Pickering, School of Public Health and Alberta Centre for Active Living, University of Alberta, Canada. Laura M. Flaman, School of Public Health, University of Alberta, Canada. John C. Spence, Faculty of Physical Education and Recreation, University of Alberta, Canada. Address correspondence to Ronald C. Plotnikoff, Centre for Health Promotion Studies, School of Public Health, University of Alberta, 5-10 University Terrace, 8303 – 112 St., Edmonton, Alberta, Canada T6G 2T4; phone: 780-492-4372; e-mail: ron.plotnikoff@ualberta.ca. , Vol. 37(2): 170-185 (April 2010) DOI: 10.1177/1090198109332599 © 2010 by SOPHE The Role of Self-Efficacy on the Relationship Between the Workplace Environment and Physical Activity: A Longitudinal Mediation Analysis Ronald C. Plotnikoff, PhD Michael A. Pickering, PhD Laura M. Flaman, MSc John C. Spence, PhD Cross-sectional studies show that self-efficacy (SE) serves as a partial mediator of the effect that percep- tions of workplace environment have on self-reported workplace physical activity (PA). To further explore the role SE plays in the relationship between perceptions of the workplace environment and workplace PA, cross-sectional mediation analyses were performed on adult employees at baseline ( n = 897), 6 months ( n = 616), and 12 months ( n = 612); a longitudinal time-sequence was incorporated into the mediation model; and correlates of residual change version of the mediation were tested. The R 2 ranged from .05 to .08 for the three cross-sectional analyses, .03 for the longitudinal analyses, and from .02 to .03 for the residual analyses. The results from the residual change model analyses supported those of the cross-sectional and longitudinal analyses, suggesting the relationship between perceived workplace environment and PA was partially medi-
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