Psychometric Properties of a Short Self-Reported Measure of Medication Adherence Among Patients With Hypertension Treated in a Busy Clinical Setting in Koreaopen access
- Authors
- Kim, Jeung-Hee; Lee, Weon-Young; Hong, Yeon-Pyo; Ryu, Wang-Seong; Lee, Kwang Je; Lee, Wang-Soo; Morisky, Donald E.
- Issue Date
- Mar-2014
- Publisher
- ELSEVIER SCIENCE INC
- Keywords
- medication adherence; self-report; questionnaires; psychometrics; hypertension
- Citation
- JOURNAL OF EPIDEMIOLOGY, v.24, no.2, pp 132 - 140
- Pages
- 9
- Journal Title
- JOURNAL OF EPIDEMIOLOGY
- Volume
- 24
- Number
- 2
- Start Page
- 132
- End Page
- 140
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/12427
- DOI
- 10.2188/jea.JE20130064
- ISSN
- 0917-5040
1349-9092
- Abstract
- Background: We examined the psychometric properties of the Korean version of the 8-item Morisky Medication Adherence Scale (MMAS-8) among adults with hypertension. Methods: A total of 373 adults with hypertension were given face-to-face interviews in 2 cardiology clinics at 2 large teaching hospitals in Seoul, South Korea. Blood pressure was measured twice, and medical records were reviewed. About one-third of the participants (n = 109) were randomly selected for a 2-week test-retest evaluation of reliability via telephone interview. Results: Internal consistency reliability was moderate (Cronbach alpha = 0.56), and test-retest reliability was excellent (intraclass correlation = 0.91; P < 0.001), although a ceiling effect was detected. The correlation of MMAS-8 scores with scores for the original 4-item scale indicated that convergent validity was good (r = 0.92; P < 0.01). A low MMAS-8 score was significantly associated with poor blood pressure control (chi(2) = 29.86; P < 0.001; adjusted odds ratio = 5.08; 95% CI, 2.56-10.08). Using a cut-off point of 6, sensitivity and specificity were 64.3% and 72.9%, respectively. Exploratory factor analysis identified 3 dimensions of the scale, with poor fit for the 1-dimensional construct using confirmatory factory analysis. Conclusions: The MMAS-8 had satisfactory reliability and validity and thus might be suitable for assessment and counseling regarding medication adherence among adults with hypertension in a busy clinical setting in Korea.
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