Outcome Measurement in the Treatment of Spasmodic Dysphonia: A Systematic Review of the Literature

Publication date: Available online 11 April 2018
Source:Journal of Voice
Author(s): Anna Rumbach, Patrick Aiken, Daniel Novakovic
PurposeThe aim of this review was to systematically identify all available studies reporting outcomes measures to assess treatment outcomes for people with spasmodic dysphonia (SD).MethodsFull-text journal articles were identified through searches of PubMed, Embase, CINAHL, and Cochrane databases and hand searching of journals.ResultsA total of 4,714 articles were retrieved from searching databases; 1,165 were duplicates. Titles and abstracts of 3,549 were screened, with 171 being selected for full-text review. During full-text review, 101 articles were deemed suitable for inclusion. An additional 24 articles were identified as suitable for inclusion through a hand search of reference lists. Data were extracted from 125 studies. A total of 220 outcome measures were identified. Considered in reference to the World Health Organization International Classification of Functioning, Disability and Health (ICF), the majority of outcomes were measured at a Body Function level (n = 212, 96%). Outcomes that explored communication and participation in everyday life and attitudes toward communication (ie, activity and participation domains) were infrequent (n = 8; 4%). Quality of life, a construct not measured within the ICF, was also captured by four outcome measures. No instruments evaluating communication partners' perspectives or burden/disability were identified.ConclusionsThe outcome measures used in SD treatment studies are many and varied. The outcome measures identified predominately measure constructs within the Body Functions component of the ICF. In order to facilitate data synthesis across trials, the development of a core outcome set is recommended.



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