Long-term follow-up of patients with spasmodic dysphonia and improved voice despite discontinuation of treatment
2017 (English)In: Folia Phoniatrica et Logopaedica, ISSN 1021-7762, E-ISSN 1421-9972, Vol. 68, no 3, 144-151 p.Article in journal (Refereed) Published
Objective: To evaluate voice function in patients with adductor spasmodic dysphonia (AdSD) who discontinued botulinum toxin (BTX) treatment because they felt that their voice had improved sufficiently. Patients and Methods: Twenty-eight patients quit treatment in 2004, of whom 20 fulfilled the inclusion criteria for the study, with 3 subsequently excluded because of return of symptoms, leaving 17 patients (11 males, 6 females) included in this follow-up study. A questionnaire concerning current voice function and the Voice Handicap Index were completed. Audio-perceptual voice assessments were done by 3 listeners. The inter- and intrarater reliabilities were r > 0.80. Results: All patients had a subjectively good stable voice, but with differences in their audio-perceptual voice assessment scores. Based on the pre-/posttreatment auditory scores on the overall degree of AdSD, patients were divided into 2 subgroups showing more and less improvement, with 10 and 7 patients, respectively. The subgroup with more improvement had shorter duration from the onset of symptoms until the start of BTX treatment, and included 7 males compared to only 4 males in the subgroup with less improvement. Conclusion: It seems plausible that the symptoms of spasmodic dysphonia may decrease over time. Early intervention and male gender seem to be important factors for long-term reduction of the voice symptoms of AdSD.
Place, publisher, year, edition, pages
S. Karger, 2017. Vol. 68, no 3, 144-151 p.
Botulinum toxin, Discontinuation of treatment, Improved voice, Long-term follow-up, Spasmodic dysphonia
Medical and Health Sciences
IdentifiersURN: urn:nbn:se:kth:diva-201861DOI: 10.1159/000449100ISI: 000393049800008ScopusID: 2-s2.0-85001560584OAI: oai:DiVA.org:kth-201861DiVA: diva2:1079383
QC 201703082017-03-082017-03-082017-03-08Bibliographically approved