Clinimetric testing of the comprehensive cervical dystonia rating scale

Cynthia L. Comella, Joel S. Perlmutter, Hyder A. Jinnah, Tracy A. Waliczek, Ami R. Rosen, Wendy R. Galpern, Charles Howard Adler, Richard L. Barbano, Stewart A. Factor, Christopher G. Goetz, Joseph Jankovic, Stephen G. Reich, Ramon L. Rodriguez, William L. Severt, Mateusz Zurowski, Susan H. Fox, Glenn T. Stebbins

Research output: Contribution to journalArticle

9 Scopus citations


Introduction: The aim of this study was to test the clinimetric properties of the Comprehensive Cervical Dystonia Rating Scale. This is a modular scale with modifications of the Toronto Western Spasmodic Torticollis Rating Scale (composed of three subscales assessing motor severity, disability, and pain) now referred to as the revised Toronto Western Spasmodic Torticollis Scale-2; a newly developed psychiatric screening instrument; and the Cervical Dystonia Impact Profile-58 as a quality of life measure. Methods: Ten dystonia experts rated subjects with cervical dystonia using the comprehensive scale. Clinimetric techniques assessed each module of the scale for reliability, item correlation, and factor structure. Results: There were 208 cervical dystonia patients (73% women; age, 59±10 years; duration, 15±12 years). Internal consistency of the motor severity subscale was acceptable (Cronbach's alpha=0.57). Item to total correlations showed that elimination of items with low correlations (

Original languageEnglish (US)
JournalMovement Disorders
StateAccepted/In press - 2016


  • Cervical dystonia
  • Cervical Dystonia Impact Profile-58
  • Focal dystonia
  • Rating scale
  • Toronto Western Spasmodic Torticollis Rating Scale

ASJC Scopus subject areas

  • Clinical Neurology
  • Neurology

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    Comella, C. L., Perlmutter, J. S., Jinnah, H. A., Waliczek, T. A., Rosen, A. R., Galpern, W. R., Adler, C. H., Barbano, R. L., Factor, S. A., Goetz, C. G., Jankovic, J., Reich, S. G., Rodriguez, R. L., Severt, W. L., Zurowski, M., Fox, S. H., & Stebbins, G. T. (Accepted/In press). Clinimetric testing of the comprehensive cervical dystonia rating scale. Movement Disorders.