Concurrent Medication Adherence in Hypertensive Patients With High-Risk Comorbidities

Background Hypertensive patients with high-risk comorbidities require medications for each condition, leading to greater burden. The number of chronic conditions can affect patients' concurrent medication adherence. Objective We aimed to compare the characteristics of groups based on their concurrent medication adherence and investigate the association between the number of high-risk comorbidities and concurrent medication adherence for patients with hypertension and high-risk comorbidities. Methods A secondary data analysis was performed with the 2018 Korea Health Panel Survey, including 2230 patients with hypertension and at least 1 high-risk comorbidity who were prescribed medications for at least 2 conditions. Using medication adherence for each condition, we identified 3 concurrent medication adherence groups: adherent, suboptimal, and nonadherent groups. Multinominal logistic regression was used to determine the association between the number of high-risk comorbidities and the concurrent medication adherence groups. Results Adherent, suboptimal, and nonadherent groups included 85%, 11%, and 4% of the patients, respectively. Whereas having more high-risk comorbidities was associated with belonging to the suboptimal group compared with the adherent group (adjusted odds ratio, 1.46), having fewer high-risk comorbidities was associated with belonging to the nonadherent group compared with the adherent group (adjusted odds ratio, 0.52). Conclusions We identified 3 groups based on their concurrent medication adherence. Our results indicated that the relationship of the number of high-risk comorbidities with the concurrent medication adherence group was inconsistent.