1. Oromandibular dystonia questionnaire (OMDQ-25): a valid and reliable instrument for measuring health-related quality of life.
- Author
-
Merz, R.I., Deakin, J., and Hawthorne, M.R.
- Subjects
- *
DYSTONIA , *PATIENTS , *QUALITY of life , *QUESTIONNAIRES , *PSYCHOMETRICS , *CROSS-sectional method , *SOCIAL history - Abstract
Clin. Otolaryngol. 2010, , 390-396 To develop and validate a disease-specific instrument to measure health-related quality of life in patients with oromandibular dystonia. Prospective, cross-sectional observational study. Tertiary referral clinic, North East England, UK. The Oromandibular Dystonia Questionnaire (OMDQ-25) was evaluated in a group of 30 patients for psychometric properties, including its sensitivity to change after Botulinum Toxin A treatment. Comparison to a generic instrument was enabled using the Glasgow Health Scale Inventory and the Glasgow Benefit Inventory (GBI). Item generation passed tests for scaling assumptions. Reliability was proven (Cronbach's α > 0.78; test-retest > 0.9) and validity supported with both convergent validity and discriminant validity. Sensitivity to change after Botulinum Toxin A treatment was established for all subscales ( P ≤ 0.005), and in comparison with the GBI, all subscales showed large effect sizes. The Oromandibular Dystonia Questionnaire (OMDQ-25) is the first reliable and valid instrument to measure health-related quality of life in patients with oromandibular dystonia. [ABSTRACT FROM AUTHOR]
- Published
- 2010
- Full Text
- View/download PDF