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.
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