Evaluation of the implementation of an insulin patient decision aid for patients with type 2 diabetes in an academic primary care clinic in Malaysia: a mixed method study

BACKGROUND: Literature surrounding patient decision aid (PDA) focus on testing effectiveness such as measuring patient or practice outcomes, while few studies looked into evaluation of implementation outcomes. It is important to assess implementation outcomes because in order for PDA to deliver its intended effects, they should first be effectively implemented. This study aimed to evaluate the implementation of an insulin PDA in an academic primary care clinic specifically measuring implementation outcomes.

METHODS: A mixed-methods sequential explanatory design was used. This study was conducted at a primary care clinic in an academic hospital from April - November 2018. The insulin PDA was implemented using a tailored implementation intervention, which comprised of 11 strategies aiming to overcome 13 prioritised implementation barriers. Evaluation data were collected from: healthcare administrators such as the head of department, the clinic coordinator, and the nursing officer who oversees the clinic operations, doctors whose tasks were to deliver the insulin PDA to patients, nurses who were responsible for making sure the insulin PDAs were available, and patients with type 2 diabetes who were offered the insulin PDA. The study commenced with the quantitative approach to assess 'Reach', 'Adoption', 'Implementation' and 'Maintenance'of the insulin PDA. Subsequently, qualitative approach was employed and qualitative interviews were conducted with the relevant stakeholders to explain the quantitative outcomes. A total of six IDIs and six FGDs were conducted with healthcare providers (healthcare policymakers: 3, doctors: 35, and staff nurses: 5), and 62 IDIs were conducted with patients.

RESULTS: For 'Reach', 88.9% (n = 48/54) of doctors and 55% (n = 11/20) of nurses attended the insulin PDA training workshops. This was attributed to their self-motivation and the mandate from the Head of Department. The PDA reached 387 patients and was facilitated by the doctors who delivered the PDA to them and their own desire to know more about insulin. Doctors' 'Adoption' of the PDA was high (83.3%, n = 45/54) due to the positive personal experience with the usefulness of the PDA. Only 65.7% (n = 94/143) of patients who received the PDA read it. The degree of 'Implementation' of the PDA varied for different tasks (ranged from 19.2 to 84.9%) and was challenged by patient and system barriers. For 'Maintenance', 80% of the doctors were willing to continue using the PDA due to its benefits.

CONCLUSION: This study highlighted that the implementation of an insulin PDA in a primary care setting is promising. Addressing the issues of social hierarchy, and healthcare providers' roles and responsibilities can further improve implementation outcomes.