Breaking the digital gap to reduce cardiovascular risk in primary care

Objective: The goal of this study was to report on the development and early usability of a new interactive mHealth app for reducing cardiovascular risk in primary care patients of low socioeconomic status attending clinics in Chile. Design: Mixed-methods design with qualitative and quantitative components. Setting: Three Chilean primary care clinics located in one urban (Santiago) and two rural areas (San Clemente and Chiguayante). Each clinic serves a population of about 24,000 people of generally low socioeconomic status with an average of 8.5 years of education. Methods: A qualitative co-design participatory framework was used to develop the Mi Salud-APS mHealth app. Three iterations of virtual workshops were held with healthcare providers and patient participants to develop the new app. Once developed, the usability phase identified, invited and followed up for 3 months a sample of primary care patients with moderate (N = 119) or high (N = 329) cardiovascular risk. Results: A total of 24 healthcare providers and 24 patients participated in the developmental workshops. Three emergent categories represented the core attributes for the mHealth app design: 'Friendly', 'Interactive' and 'Pertinent'. In the usability phase of the sample of 448 patients, 98% downloaded the app, and 64.6% of them logged in and used it for an average of 1.46 (0.5-10) times weekly. Conclusion: Findings suggest that patient and healthcare provider contributions to the development of the mHealth app accurately reflect the interests and experiences of both groups and together helped achieve the high usability levels observed among primary care patients enrolled in clinics in underserved communities.