Abstract | AIM: The aim of present study was to perform the translation, cultural adaptation, and validation of the Medication Adherence Report Scale (MARS-P9) for the European Portuguese language in a sample of chronic pain patients. METHODS: A Portuguese version of the nine-item MARS (©Professor Rob Horne) scale (MARS-P9) was constructed through a process of translation, back translation, and experts' panel evaluation. A total of 141 chronic pain patients were subsequently evaluated at four time assessments during a 1-year pain medication treatment. The protocol interview included the assessment of pain intensity and interference (BPI), clinical outcomes and quality of life (S- TOPS), and MARS-P9. RESULTS: The internal consistency coefficient was acceptable for the total scale (α = 0.84). Exploratory factor analysis revealed a two-factor structure (intentional and unintentional nonadherence) that explained 61% of the variance. Convergent and discriminant validity were demonstrated by correlations between MARS scores and pain interference (r = 0.180, P ≤ 0.01) and S- TOPS (r = 0.242, P ≤ 0.05). CONCLUSION: MARS-P9 has been shown to be an adequate instrument for Portuguese researchers and clinicians to assess the pattern of adherence during the management of chronic pain.
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Authors | Rute Sampaio, Luís Filipe Azevedo, Cláudia Camila Dias, Rob Horne, José M Castro Lopes |
Journal | Journal of evaluation in clinical practice
(J Eval Clin Pract)
Vol. 25
Issue 2
Pg. 346-352
(Apr 2019)
ISSN: 1365-2753 [Electronic] England |
PMID | 30648328
(Publication Type: Journal Article)
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Copyright | © 2019 John Wiley & Sons, Ltd. |
Topics |
- Adult
- Aged
- Chronic Pain
(drug therapy)
- Culture
- Factor Analysis, Statistical
- Female
- Humans
- Interviews as Topic
- Longitudinal Studies
- Male
- Medication Adherence
- Middle Aged
- Portugal
- Qualitative Research
- Quality of Life
- Self Report
- Surveys and Questionnaires
- Young Adult
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