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ABSTRACT
Dietary behaviour plays a crucial role in both the onset and the management of coronary artery disease (CAD). To develop effective interventions to modify dietary behaviours of patients, it is fundamental to identify and examine the predictive factors that are relevant to healthy dietary behaviour. The Health Action Process Approach provides a useful framework for understanding and predicting the process of health behaviour. The aim of the current study is to clarify the role and effect of received social support in the HAPA model. A longitudinal sample of 117 CAD patients filled out a questionnaire at three time points. Along with HAPA constructs, dietary behaviour was assessed with a food frequency questionnaire. To investigate the longitudinal associations of the constructs, structural equation modelling with latent variables was employed. In the final model, outcome expectancies and pre-action self-efficacy jointly predicted behavioural intention. In the post-intentional phase, social support served as a mediator between intention and action planning. Moreover, coping planning mediated the relationship between action planning and dietary behaviour. These results confirmed the mediator role of social support in the intention-behaviour relationship. This finding suggests that social support can be a crucial component to facilitate healthy dietary behaviour.
Acknowledgments
The authors would like to thank the Division of Interventional Cardiology, the Department of Cardiac Surgery, Heart Institute, University of Pécs, Hungary, and all of the study participants.