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Sallem FAZ. Translation to Portuguese and validation of the Toronto Western Spasmodic Torticollis Rating Scale (TWSTRS) [Thesis]. São Paulo: “Faculdade de Medicina, Universidade de São Paulo”; 2015. Background: Cervical dystonia (CD) is the most common focal dystonia, its clinical picture and outcome going far beyond the involuntary muscle contractions. This illness has a significant impact over the social and professional lives of affected individuals, leading to severe compromise of quality of life (QoL), and cervical pain. A complete clinical assessment is of utmost importance to an adequate management of this disease. There is no validated clinical tool in Brazil devised to a holistic evaluation of CD patients. The Toronto Western Spasmodic Torticollis Rating Scale (TWSTRS) is a world famous scale used in several studies of CD evaluation, and its validation is the objective of this study. Patients and methods: The transcultural adaptation was performed according to published criteria. After the initial pre-test with 30 patients, it was observed that patients with schooling under 8 years could not understand the whole scale, and the tool underwent a new adaptation process after modifications suggested by the judges, producing the adapted scale. The validation followed standard methods: comparison with a QoL instrument (WHOQOL-Bref); test-retest with three examinations 2-weeks apart from each other; Cronbach’s α calculation of the items of the scale; intraclass correlation coefficient (CCI) and 95% confidence interval (95%CI) determination; and production of the Bland-Altman graphs. Results: The final version of the scale was easy to understand by all patients examined. The internal consistency was good to excellent (0.599 for domain Intensity, 0.860 for the domain Disability, and 0.878 for domain Pain). There was a good correlation between the adapted scale and the QoL instrument and good concordance between examiners. The reliability and reproducibility according to CCI and 95% CI reached acceptable values. The Bland-Altman graphs displayed randomly dispersed data, suggesting no tendency in the evaluations. Conclusions: The Portuguese version of the TWSTRS is valid for evaluation of Brazilian CD patients, has good internal consistency, and is reproducible between examiners. Descriptors: Dystonia; torticollis; Validation studies; Quality of life; Pain; Translation.

Tradução para o Português e validação da escala de avaliação de torcicolo espasmódico de Toronto (Toronto Western Spasmodic Torticollis Rating Scale)