title: Reliability and known-group validity of the Arabic version of the 8-item Morisky Medication Adherence Scale among type 2 diabetes mellitus patients.
abstract: No validation study has previously been made for the Arabic version of the 8-item Morisky Medication Adherence Scale (MMAS-8(©)) as a measure for medication adherence in diabetes. This study in 2013 tested the reliability and validity of the Arabic MMAS-8 for type 2 diabetes mellitus patients attending a referral centre in Tripoli, Libya. A convenience sample of 103 patients self-completed the questionnaire. Reliability was tested using Cronbach alpha, average inter-item correlation and Spearman-Brown coefficient. Known-group validity was tested by comparing MMAS-8 scores of patients grouped by glycaemic control. The Arabic version showed adequate internal consistency (α = 0.70) and moderate split-half reliability (r = 0.65). Known-group validity was supported as a significant association was found between medication adherence and glycaemic control, with a moderate effect size (ϕc = 0.34). The Arabic version displayed good psychometric properties and could support diabetes research and practice in Arab countries.
authors.affiliation: Department of Community Health, Universiti Kebangsaan Malaysia Medical Centre, Kuala Lumpur, Malaysia.
authors.forename: S T
authors.initials: ST
authors.lastname: Ashur
authors.affiliation: Department of Community Health, Universiti Kebangsaan Malaysia Medical Centre, Kuala Lumpur, Malaysia.
authors.forename: K
authors.initials: K
authors.lastname: Shamsuddin
authors.affiliation: Department of Community Health, Universiti Kebangsaan Malaysia Medical Centre, Kuala Lumpur, Malaysia.
authors.forename: S A
authors.initials: SA
authors.lastname: Shah
authors.affiliation: National Centre for Diabetes and Endocrinology, Tripoli, Libya.
authors.forename: S
authors.initials: S
authors.lastname: Bosseri
authors.affiliation: Department of Community Health Sciences, UCLA Fielding School of Public Health, Los Angles, California, United States of America.
authors.forename: D E
authors.initials: DE
authors.lastname: Morisky
mesh_terms: D000328:Adult; D003924:Diabetes Mellitus, Type 2 / Q000188:drug therapy*; D005260:Female; D006801:Humans; D008002:Libya; D008297:Male; D055118:Medication Adherence; D008875:Middle Aged; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires