Psychometric Properties of Persian Version of the 8-item Morisky Medication Adherence Scale in Type 2 Diabetes Patients
Journal Title: Journal of Clinical and Diagnostic Research - Year 2019, Vol 13, Issue 8
Abstract
ABSTRACT Introduction: The 8-items Morisky Medication Adherence Scale (MMAS-8) is a brief questionnaire that is applied to assess medication-taking behaviours. Aim: To evaluate the validity and reliability of the Persian version of MMAS-8 among Type 2 Diabetes Mellitus (T2DM) patients in Iran. Materials and Methods: A cross-sectional study was conducted among 589 T2DM patients in Kerman city (southeast Iran) from January to March 2017. Data were collected using MMAS-8 and diabetes self-management questionnaires. To check test re-test reliability and to determine the internal consistency Intra-class Correlation Coefficient (ICC) and Cronbach’s alpha method were employed. Also, convergent validity was assessed by correlation analysis method. Results: Cronbach’s alpha and ICC of MMAS-8 were 0.75 and 0.88, respectively. The correlation coefficient between MMAS-8 and medication adherence subscale of diabetes self-management questionnaire was 0.85 (p<0.001). Exploratory Factor Analysis (EFA) showed two factors for MMAS-8. The first factor included items 1, 2, 3, 4, 6, and 8. Moreover, items 5 and 7 fell in the second factor. Confirmatory Factor Analysis (CFA) indices for modified MMAS-8 without Items 5 and 7 model (X2=9.3, DF=6, P=0.15, CFI=0.99, RMSEA=0.04, TLI=0.98, and NFI=0.98) were acceptable. Conclusion: In this study, the Persian version of MMAS-8 was investigated to find out whether it is a reliable and valid scale for assessing medication-taking behaviours in T2DM patients. The results showed that it can be applied for Iranian diabetic patients by health care providers and researchers.
Authors and Affiliations
Mehran Nakhaeizadeh, Ali Khalooei
Keywords
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- EP ID EP639336
- DOI 10.7860/JCDR/2019/41408.13076
- Views 111
- Downloads 0
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