RT Journal Article SR Electronic T1 Validity and reliability of a rating scale for the primary torsion dystonias JF Neurology JO Neurology FD Lippincott Williams & Wilkins SP 73 OP 73 DO 10.1212/WNL.35.1.73 VO 35 IS 1 A1 Robert E. Burke A1 Stanley Fahn A1 C. David Marsden A1 Susan B. Bressman A1 Carol Moskowitz A1 Joseph Friedman YR 1985 UL http://n.neurology.org/content/35/1/73.abstract AB For quantitative assessment of the primary torsion dystonias, a rating scale is proposed that has two sections—a Movement Scale, based on examination, and a Disability Scale, based on the patient's statements about seven activities of daily living. We assessed the validity of the Movement Scale by comparing scores with a ranking of patients according to dystonia severity and with ratings of the patients on the Disability Scale. In addition, we assessed the inter-and intra-rater reliability of the scale by comparing independent scorings of patients by four examiners and by comparing scorings by the same examiners performed at different times. We found that the Movement Scale was a valid and reliable indicator of the severity of primary torsion dystonia.