Identifying relevant factors for successful implementation into routine practice: expert interviews to inform a heart failure self-care intervention (ACHIEVE study)

BACKGROUND: Adherence to heart failure (HF) self-care behaviours has been found to be effective for alleviating illness symptoms, increasing quality of life and reducing hospital re-admissions and mortality. However, many patients fail to implement on-going self-care into their daily lives. It is therefore crucial to improve the behaviour of HF patients to increase self-care adherence. The aim of this study is to identify relevant factors to successfully implement a complex, theory-based HF self-care intervention into routine practice. METHODS: We conducted semi-structured interviews to obtain key stakeholders' opinions on previously developed behaviour change techniques for enhancing HF patients' self-care behaviours, in order to optimise implementation of these techniques in an intervention. The interview topic guide was developed based on the Normalisation Process Theory (NPT), a tool that takes into account the feasibility of implementation and the acceptability to stakeholders. Interviews were analysed using thematic analysis and supported by MAXQDA 2020, a software for qualitative research. RESULTS: Interview participants included 18 key stakeholders consisting of three crucial groups: clinical experts (n = 7), patients (n = 3) and high calibre policy makers/potential funders (n = 8). The interviews revealed numerous factors to consider for successful implementation of an intervention into routine practice. The findings are presented according to two major categories: (1) themes within the NPT framework and (2) themes beyond the NPT framework. Themes within the NPT component 'Coherence' include three sub-themes: 'understandability', 'value beyond existing interventions' and 'perceived benefits'. The NPT component 'Cognitive participation' revealed two sub-themes: 'time resources' and 'financial sustainability'. Finally, the NPT component 'Collective action' uncovered three sub-themes: 'need for training', 'compatibility with existing practice' and 'influence on roles'. A further two themes were identified beyond the NPT framework, namely: 'structural challenges' and (2) 'role of carers'. CONCLUSIONS: Factors identified previously by NPT were validated, but stakeholders further identified relevant aspects beyond NPT. Based on these findings, we suggest the existing NPT framework could be expanded to include a fifth component: questions considering specific environmental factors (contextual considerations). Sensitising researchers to these issues at an early stage when designing an intervention can facilitate its later success.