A mixed methods approach to exploring the moderating factors of implementation fidelity of the integrated chronic disease management model in South Africa
Abstract Background Chronic care models like the Integrated Chronic Disease Management (ICDM) model are innovative strategies to improve the efficiency and quality of care for patients with chronic diseases. However, there is a dearth of studies assessing the moderating factors of fidelity during the implementation of the ICDM model. The aim of this study is to identify moderating factors of implementation fidelity of the ICDM model. Methods This was a cross-sectional mixed method study conducted in two health districts in South Africa. The process evaluation and implementation fidelity frameworks were used to guide the assessment of moderating factors on the implementation fidelity of the ICDM model. A total of 30 healthcare workers from four clinics with different levels of implementation fidelity of the ICDM model were interviewed. Linear regression and descriptive statistics were used to analyse quantitative data while qualitative data were analysed thematically. Results The median age of participants was 36.5 (IQR: 30.8-45.5), and they had been in their roles for a median of 4.0 (IQR: 1.0 – 7.3)years. The moderating factors of implementation fidelity of the ICDM model were the existence of facilitation strategies (training and clinical mentorship); intervention complexity (healthcare worker, time and space integration); and participant responsiveness (observing operational efficiencies, compliance of patients and staff attitudes). One feature of the ICDM model that was said to compromise fidelity was the inclusion of tuberculosis patients in the same stream (waiting areas, consultation rooms) as other patients with non-communicable diseases and those with HIV/AIDS with no clear infection control guidelines. Participants also suggested that poor adherence to any one component of the ICDM model affected the implementation of the other components. Contextual factors that affected fidelity included supply chain management, infrastructure and adequate staff, and balanced patient caseloads. Conclusion There are multiple (context, participant responsiveness, intervention complexity and facilitation strategies) interrelated moderating factors of the implementation fidelity of the ICDM model. Augmenting some of the elements, like supply chain management and leadership support, could further improve the degree of fidelity during the implementation of the ICDM model.