Parkinson's Disease Research Today is a free monthly online journal that collates and summarizes the latest research about Parkinson's Disease, including details on symptoms, treatment, genetics, medication. | |||||||
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The SCOPA-Motor Scale for assessment of Parkinson's disease is a consistent and valid measure.Martínez-Martín P, Benito-León J, Burguera JA, Castro A, Linazasoro G, Martínez-Castrillo JC, Valldeoriola F, Vázquez A, Vivancos F, del Val J, van Blercom N, Frades B National Center for Epidemiology, Carlos III Institute of Public Health, C. Sinesio Delgado, 6, 28029 Madrid, Spain. pmartinez@isciii.es OBJECTIVE: The SCOPA-Motor Scale (S-MS) for assessment of Parkinson's disease (PD), contains 21 items in three domains: Motor examination, Disability, and Complications. Our objective was to validate the S-MS Spanish version. STUDY DESIGN AND SETTING: This validation study was based on a multicenter, cross-sectional, one-point-in-time evaluation design. The applied measures were: Unified Parkinson's Disease Rating Scale-3.0 (UPDRS); S-MS; PD Global Evaluation (PDGE); and Clinical Global Impression of severity (CGI). Completeness of data collection, floor and ceiling effect, internal consistency, precision, and construct and discriminative validity were analyzed in 151 PD patients. RESULTS: Scores from S-MS were fully computable. Floor effect was high for Complications (43.7%). Cronbach's alpha was > 0.90 for every domain, and item-total correlation was > 0.70 except for Examination. Standard error of measurement (SEM) ranged from 0.40 to 2.4. Convergent validity with corresponding UPDRS sections yielded coefficients > 0.90. Discriminative validity across Hoehn and Yahr (HY) and CGI stages was significant (Kruskal-Wallis, P < .0001). Insofar as internal consistency was concerned, alpha-values of the Examination sections were marginally higher for the UPDRS than for the S-MS (a finding perhaps accounted for by redundancy in this part of the UPDRS). CONCLUSION: The S-MS is a consistent and valid scale, shorter by almost half than the UPDRS. Published 7 June 2005 in J Clin Epidemiol, 58(7): 674-9.
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