Abstract
Introduction
While previous studies indicate a significant relationship between self-efficacy and physical activity, less research has focused on this relationship among patients with type 2 diabetes. The purpose of this investigation was to examine whether self-efficacy mediated the relationship between participation in a 1-month, print-based physical activity intervention and improvements in activity levels.
Methods
Participants (N = 85; mean age = 57; 73% Caucasian; 69% female) were recruited from a community diabetes center. The intervention was individually-tailored based on theoretical constructs, including self-efficacy.
Results
After controlling for age, baseline activity, and baseline self-efficacy, the tailored intervention was associated with significant improvements in physical activity, 95% CI [23.01, 271.68] as well as self-efficacy, CI [0.02, 3.48]. There was an indirect effect of treatment on physical activity through self-efficacy, CI [0.77, 73.11], and the direct effect of treatment on physical activity was no longer significant, CI [−7.33, 253.40], after the influences of self-efficacy change were accounted for in the model.
Discussion
Results supported a mediation effect, such that the treatment effect on physical activity was completely mediated by changes in self-efficacy. Although replication is needed, results support the theoretical rationale for targeting self-efficacy to promote physical activity among patients with type 2 diabetes.
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Acknowledgements
This study was supported by the Florida State University Council on Research and Creativity (Planning Grant 017294). We would like to thank Dr. Melissa Napolitano for her valuable consultation on this project. We are also grateful to the entire staff of the Tallahassee Memorial Diabetes Center for their support and contribution to this project.
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Dutton, G.R., Tan, F., Provost, B.C. et al. Relationship between self-efficacy and physical activity among patients with type 2 diabetes. J Behav Med 32, 270–277 (2009). https://doi.org/10.1007/s10865-009-9200-0
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DOI: https://doi.org/10.1007/s10865-009-9200-0