Validation and psychometric properties of the 8-item Morisky Medication Adherence Scale (MMAS-8) in type 2 diabetes patients in Spain

To validate a translated and culturally adapted version of the Morisky Medication Adherence Scale for use in Spanish population, and to examine the psychometric properties of this scale in patients with type 2 diabetes mellitus in Spain. This cross-sectional study was conducted in a single universit...

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Published inAtención primaria Vol. 53; no. 2; p. 101942
Main Authors Martinez-Perez, Pablo, Orozco-Beltrán, Domingo, Pomares-Gomez, Francisco, Hernández-Rizo, Juan L., Borras-Gallen, Anna, Gil-Guillen, Vicente F., Quesada, Jose A., Lopez-Pineda, Adriana, Carratala-Munuera, Concepción
Format Journal Article
LanguageEnglish
Published Spain Elsevier España, S.L.U 01.02.2021
Elsevier
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Summary:To validate a translated and culturally adapted version of the Morisky Medication Adherence Scale for use in Spanish population, and to examine the psychometric properties of this scale in patients with type 2 diabetes mellitus in Spain. This cross-sectional study was conducted in a single university hospital in Spain. Patients diagnosed with type 2 diabetes mellitus at least 1 year before inclusion, being treated with anti-diabetic medication were included. We used the Spanish version of the scale to measure treatment adherence. three level categorical scale is broken down into low adherence (score of <6), medium adherence (score of 6 to <8) and high adherence (score of 8). To validate the questionnaire, we measured internal consistency through Cronbach's α, confirmed construct validity through an exploratory principal component analysis and assessed test–retest reliability. 232 patients met the inclusion criteria. The Cronbach's α coefficient was 0.40 (95% CI 0.28–0.52). The exploratory principal component analysis showed three components. The intraclass correlation coefficient was 0.718 (95% CI 0.564–0.823). the Spanish version of the Morisky Medication Adherence scale showed low internal consistency, the exploratory factor analysis identified three dimensions, and the test–retest reliability was acceptable, therefore, psychometric properties of MMAS-8 are not suitable for measuring medication adherence in type 2 diabetes mellitus patients from Spain. Validar la herramienta de adherencia terapéutica de Morisky tras una adaptación cultural y lingüística para su uso en la población española, y examinar sus propiedades psicométricas en pacientes con diabetes mellitus tipo 2 en España. Se realizó un estudio transversal en un hospital universitario en España. Se incluyeron pacientes diagnosticados de diabetes mellitus tipo 2 al menos un año antes del estudio y tratados con antidiabéticos orales. Se utilizó la versión traducida de la escala para medir la adherencia al tratamiento. Nivel de adherencia categorizado a través de 3 escalas, baja (<6 puntos), media (6 a <8 puntos) o alta (8 puntos). La consistencia interna del cuestionario se evaluó a través del coeficiente α de Cronbach, y se realizó un análisis exploratorio de los componentes principales para confirmar la validez del constructo, y se evaluó la fiabilidad a través del test-retest. Doscientos treinta y dos pacientes cumplieron con los criterios de inclusión. El coeficiente α de Cronbach era 0,40 (IC 95%: 0,28-0,52). El análisis exploratorio mostró 3 componentes principales. El coeficiente de correlación intraclase era de 0,718 (IC 95%: 0,564-0,823). La versión adaptada de la escala de adherencia terapéutica de Morisky mostró una consistencia interna baja, el análisis factorial exploratorio identificó 3 dimensiones y la fiabilidad test-retest fue aceptable, por lo tanto, las propiedades psicométricas de MMAS-8 no son adecuadas para medir la adherencia a la medicación en pacientes con diabetes mellitus tipo 2 en España.
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ISSN:0212-6567
1578-1275
1578-1275
DOI:10.1016/j.aprim.2020.09.007