Associations Between Psychological Factors and Adherence to Health Behaviors After Percutaneous Coronary Intervention: The Role of Cardiac Rehabilitation

Background Cardiac rehabilitation (CR) participation after percutaneous coronary intervention (PCI) for coronary heart disease lowers the disease burden and risk of recurrent cardiac events. Examining psychological factors may improve post-PCI health behavior adherence.Purpose To determine whether psychological factors are associated with post-PCI health behavior adherence, and the role of CR participation.Methods Data from 1,682 patients (22.1% female, Mage = 64.0, SDage = 10.5 years) from the THORESCI cohort were included. Adjusted mixed models were used to examine associations between psychological factors and the 1-year course of health behaviors, using interactions to test for moderation by CR participation.Results Psychological factors were associated with the trajectories of adherence to medical advice, exercise, and diet. The strongest association found was between optimism and the trajectory of dietary adherence (B: = -0.09, p = .026). Patients with high optimism levels had a worse trajectory of dietary adherence compared to patients with low to middle optimism levels. Participation in CR buffered the associations of high anxiety, pessimism, and low to middle resilience, but strengthened the associations of high stress in the past year with the probability of smoking.Conclusions Psychological factors are associated with post-PCI health behavior adherence, but the pattern of associations is complex. Patients with high levels of anxiety, pessimism, and low to middle resilience levels may disproportionately benefit from CR. Cardiac rehabilitation programs could consider this to improve post-PCI health behavior adherence.Clinical Trials Registration # NCT02621216. For patients with coronary heart disease who have undergone percutaneous coronary intervention (PCI), participating in cardiac rehabilitation (CR) reduces the disease burden and the risk of future cardiac events. However, adherence to the health behaviors targeted in CR could be improved. Using data from 1,682 patients included in the THORESCI study, we explored whether psychological factors could predict health behavior adherence and the role of participation in CR. Results revealed that psychological factors were linked to adherence to medical advice, exercise, and diet. Overall, patients with low to moderate optimism levels exhibited more favorable changes in healthy dietary habits than patients with high levels of optimism. Participation in CR made the link between high anxiety, pessimism, low to moderate resilience, and lower adherence to health behaviors less strong. Cardiac rehabilitation programs could use these results to enhance the health behavior adherence of patients who have undergone PCI.