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Patterns of Adherence to Secondary Prevention Measures Among Chinese Patients With Coronary Artery Disease

Background Adherence to secondary prevention measures among patients with coronary artery disease (CAD) affects patient prognosis, whereas patients' adherence behaviors change over time. Objectives The aims of this study were to identify adherence trajectories to secondary prevention measures including medication-taking and a heart-healthy lifestyle and to estimate predictors of adherence trajectories among patients with CAD. Methods This longitudinal study enrolled 698 patients with CAD who received a percutaneous coronary intervention in China. Demographics, clinical characteristics, adherence to secondary prevention measures, and patient-related factors including disease knowledge, self-efficacy, and health literacy were measured during hospitalization. Adherence behaviors were followed at 1, 3, and 6 months, and 1 year after discharge. Group-based trajectory models estimated adherence trajectories, and multinomial logistic regression identified trajectory group predictors. Results Four trajectory groups were identified for medication-taking adherence: sustained adherence (39.9%), increasing and then decreasing adherence (23.1%), increasing adherence (23.4%), and nonadherence (13.6%). The 3 adherence trajectory groups for a heart-healthy lifestyle were sustained adherence (59.7%), increasing adherence (28.3%), and nonadherence (12.0%). Married patients were more likely (odds ratio [OR], 3.42; 95% confidence interval [CI], 1.56–7.52) to have sustained adherence to medication-taking. However, patients with higher disease knowledge were less likely (OR, 0.93; 95% CI, 0.87–0.99) to be adherent. Patients who were not working (OR, 2.25; 95% CI, 1.03–4.92) had higher self-efficacy (OR, 1.21; 95% CI, 1.08–1.37). Those with higher health literacy (OR, 1.18; 95% CI, 1.01–1.38) were more likely to have sustained adherence to a heart-healthy lifestyle. However, patients having no coronary stents (OR, 0.36; 95% CI, 0.19–0.70) were less likely to have done so. Conclusions Trajectories of adherence to secondary prevention measures among mainland Chinese patients with CAD are multipatterned. Healthcare providers should formulate targeted adherence support, which considers the influence of disease knowledge, self-efficacy, and health literacy.