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Objective: Non‐adherence to adjuvant endocrine therapy (AET) for breast cancer leads to increased recurrence and mortality risk and healthcare costs. Evidence on feasible, effective AET adherence interventions is scarce. This paper describes the systematic adaptation of the cost‐effective adherence improving self‐management strategy (AIMS) for patients with HIV to AET for women after breast cancer treatment. Methods: We followed the intervention mapping protocol for adapting interventions by conducting a needs assessment, reviewing target behaviours and determinants, reassessing behaviour change methods and adapting programme content. Therefore, we performed a literature review, consulted behavioural theory and organised nine advisory board meetings with patients and healthcare professionals. Results: Non‐adherence occurs frequently among AET users. Compared to HIV treatment, AET is less effective, and AET side effects are more burdensome. This drives AET treatment discontinuation. However, the key determinants of non‐adherence are largely similar to HIV treatment (e.g. motivation, self‐regulation and patient–provider relationship); therefore, most strategies in AIMS‐HIV also seem suitable for AIMS‐AET. Modifications were required, however, regarding supporting patients with coping with side effects and sustaining treatment motivation. Conclusion: AIMS seems to be a suitable framework for adherence self‐management across conditions and treatments. Intervention mapping offered a transparent, systematic approach to adapting AIMS‐HIV to AET. [ABSTRACT FROM AUTHOR]

Background: Nonadherence to medication and low physical activity contribute to morbidity, mortality, and decreased quality of life among patients with chronic heart failure (CHF). Effective interventions that can be delivered during routine clinical care are lacking., Objective: We aimed to adapt the feasible and cost-effective Adherence Improving self-Management Strategy (AIMS) for patients with human immunodeficiency virus (HIV) to CHF treatment. Subsequently, we determined its acceptability and feasibility., Methods: Adherence Improving self-Management Strategy is a systematic, nurse-delivered counseling intervention blended with eHealth to facilitate patient self-management. We used the intervention mapping framework to systematically adapt AIMS-HIV to AIMS-CHF, while preserving essential intervention elements. Therefore, we systematically consulted the scientific literature, patients with CHF and nurses, and pretested intervention materials., Results: Adherence Improving self-Management Strategy-HIV was modified to AIMS-CHF: a multiple-behavior change intervention, focused on medication adherence and physical activity. Key self-management determinants (such as attitudes, self-efficacy, and self-regulatory skills) and organization of care (such as specialized nurses delivering AIMS) were similar for HIV and heart failure care. The AIMS protocol, as well as material content and design, was systematically adapted to CHF. Preliminary testing suggests that AIMS-CHF is likely feasible and acceptable to patients with CHF and care providers., Conclusion: Using the intervention mapping protocol, AIMS-HIV could be systematically adapted to AIMS-CHF and seems acceptable and feasible. Evidence from the literature, behavioral theory, and input from nurses and patients were essential in this process. Adherence Improving self-Management Strategy-CHF should now be tested for feasibility and effectiveness in routine care., Competing Interests: The authors have no conflicts of interest to disclose., (Copyright © 2024 The Authors. Published by Wolters Kluwer Health, Inc.)