KMID : 1039620210110040272
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Korean Journal of Family Practice 2021 Volume.11 No. 4 p.272 ~ p.279
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Impact of Residential Area on Antihypertensive Medication Adhrence in Seoul, Korea
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Han Bo-Mi
Kim Seung-Jae Choi Ho-Chun Kwon Oh-Deog Cho Be-Long
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Abstract
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Background: This study aimed to investigate the relationship between residential area and antihypertensive medication adherence in Seoul, therepresentative metropolis of Korea.
Methods: We obtained data from the National Health Insurance Service-National Sample Cohort (NHIS-NSC) of Korea covering the years 2008?2013.
NHIS-NSC curates a random data sample comprising 2.2% (N=1,048,061) of the whole population (N=46,605,433). The subject pool consisted of35,478 residents of Seoul over 20 years of age, who had been on an antihypertensive medication for at least one year. Medication adherence wasassessed using the medication possession ratio (MPR). We divided subjects by administrative district (Gu) within Seoul, and analyzed proportions ofadherent patients.
Results: Among administrative districts in Seoul, the proportion of adherent patients (MPR >80%) was highest in Gangdong-gu (71.8%), withSeongdong-gu (71.7%), Songpa-gu (71.4%), and Jung-gu (70.9%) closely following. The proportion of adherent patients was lowest in Gwanak-gu(65.4%), and Jongro-gu (65.5%), with Geumcheon-gu (65.7%) slightly higher. Trends in proportion of adherent patients among districts remainedsimilar after adjustments were made for confounding factors at the individual level. Trends also remained similar after adjusting for confoundingfactors at the local level.
Conclusion: Health system factors such as distribution and accessibility of medical institutions by administrative districts exerted relatively littleinfluence on antihypertensive medication adherence in Seoul.
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KEYWORD
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Residential Area, Antihypertensive Medication, Medication Adherence, Seoul
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