Abstract
Diabetes is a common chronic disease that is considered as one of the fastest-growing health problems in the world. Adherence to medications could be an important factor in reducing these complications and improving the quality of life. The purpose of this research was to assess the impact of treatment adherence on health-related quality of life in patients with type 2 diabetes. A multicenter cross-sectional study was carried out among 368 diabetes patients. General Medication Adherence Scale was used to assess the adherence level and EuroQol-5D to assess the quality of life. The results show that 19%, 21%, and 23% of patients had maintained low medication adherence due to patient's intentional or unintentional behavior due to additional diseases or pills burden and due to financial constraints, respectively. Overall, 43% (n=162) participants had maintained high medication adherence, and 37% (n=138) had maintained low medication adherence to antidiabetic drugs. Nearly one-third (31%) of patients with high overall adherence had perfect health state in comparison with 4% among patients with low adherence. Further, the lower proportion (21%) of patients with high overall adherence had perfect health state in comparison with that among patients with low adherence (34%). In addition to the overall adherence, the association was statistically significant for the domains related to non-adherence due to the patient's intentional or unintentional behavior (p-value<0.001) and non-adherence due to additional diseases or pills burden (p-value<0.001) after taking into account of socio-demographic and clinical characteristics. In conclusion, the findings suggest that the policymakers should establish an intervention to improve adherence to diabetic treatment, and thus improve the quality of life for the type 2 diabetic patients.