The Effectiveness of Dietary Approaches to Stop Hypertension (DASH) Mobile Applications in Supporting a Healthy Diet and Controlling Hypertension in Adults: Systematic Review (Preprint)

BACKGROUND Uncontrolled hypertension is a public health issue, with increasing prevalence worldwide. The Dietary Approach to Stop Hypertension (DASH) diet is one of the most effective dietary approaches for lowering blood pressure (BP). Dietary mobile applications (apps) have gained popularity and are being used to support DASH diet self-management, aiming to improve DASH diet adherence and thus lower BP OBJECTIVE This systematic review aimed to assess the effectiveness of smartphone apps that support self-management to improve DASH diet adherence and, consequently, reduce BP. A secondary aim was to assess user engagement, satisfaction and acceptance, and usability related to DASH mobile app use. METHODS EMBASE (OVID), Cochrane Library, CINAHL, Web of Science, Scopus, and Google Scholar electronic databases were used to conduct systematic searches for studies conducted between 2008 and 2021 that used DASH smartphone apps to support self-management. The included articles’ reference lists were also checked. RESULTS Five studies (three RCTs and two pre-post studies) including 334 participants altogether examined DASH mobile apps. All studies found a positive trend related to the use of DASH smartphone apps, but the three RCTs had a high risk of bias. One pre-post study had a high risk of bias, the other had a low risk. As a consequence, no firm conclusions can be drawn regarding DASH smartphone apps’ effectiveness in increasing DASH diet adherence and lowering blood pressure. All the apps appeared to be accepted and easy to use. CONCLUSIONS There is weak emerging evidence of a positive effect of using DASH smartphone apps supporting self-management to improve DASH diet adherence and, consequently, lower BP. Further research is needed to provide high-quality evidence that can determine the effectiveness of DASH smartphone apps. CLINICALTRIAL Review article