• Pablo Martinez-Perez, Domingo Orozco-Beltrán, Francisco Pomares-Gomez, Juan L Hernández-Rizo, Anna Borras-Gallen, Vicente F Gil-Guillen, Jose A Quesada, Adriana Lopez-Pineda, and Concepción Carratala-Munuera.
• Family Medicine Chair, Clinical Medicine Department, Miguel Hernandez University, San Juan de Alicante, Spain.
• Aten Primaria. 2021 Feb 1; 53 (2): 101942101942.

AimsTo 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.DesignThis 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.InterventionWe used the Spanish version of the scale to measure treatment adherence.Principal Measurementsthree 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.Results232 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).Conclusionsthe 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.Copyright © 2020 The Author(s). Publicado por Elsevier España, S.L.U. All rights reserved.

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