Unveiling the Nexus: Depressive Symptoms and Medication Adherence in Hypertensive Patients' Self-care: A Systematic Review.

Background: Hypertension, a significant public health concern, is frequently linked to emotional disorders like depression. Research shows a reciprocal link between depression and hypertension, potentially influencing patients' adherence to self-care routines. Objective: This systematic review aimed to examine the association between depressive symptoms and aspects of self-care, with a focus on medication adherence in individuals diagnosed with hypertension. Methods: Following PRISMA guidelines, a systematic review was conducted by searching PubMed, PsycINFO and Scopus until March 17, 2023. The included studies involved quantitative primary research conducted in English, focusing on adults (≥18 years) diagnosed with hypertension and experiencing depressive symptoms. Observational studies were assessed using the Newcastle-Ottawa Scale, and randomized controlled trials were evaluated using the revised Cochrane Risk of Bias Tool (RoB 2.0). Due to the great diversity of these studies, a narrative synthesis of the results was undertaken. Results: A total of 18 studies involving 6,131 people with hypertension, that met our eligibility criteria were ultimately included. The reported rates of depressive symptoms ranged from 4% to 43%. Of these studies, nine reported a statistically significant association, showcasing an adverse impact of depressive symptoms on medication adherence. The remaining nine did not confirm the above. Conclusion: This systematic review highlights the diverse body of research exploring depressive symptoms and medication adherence among individuals with hypertension. The review suggests a need for increased attention to self-care practices, particularly in relation to adherence to antihypertensive medication. However, it recommends the conduction of more robust longitudinal studies to comprehensively explore this relationship.