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A systematic review of evidence on the effectiveness of voice therapy for voice disorders in Japan Shinichi Taniai 1 , Kodama Narihiro 2 , Eri Miyata 3 , Chieri Kato 4 , Takeshi Sato 5 , Kenichi Hasegawa 6 , Junichi Fukaura 7 1Department of Otolaryngology-Head and Neck Surgery, National Defense Medical College 2Department of Speech-Language Pathology and Audiology, Faculty of Rehabilitation, Kawasaki University of Medical Welfare 3Department of Otolaryngology-Head and Neck Surgery, Kansai Medical University 4Department of Otorhinolaryngology-Head and Neck Surgery, Osaka University Hospital 5Department of Otolaryngology-Head and Neck Surgery, Tohoku University Graduate School of Medicine 6Speech-Language-Hearing Therapist Course, International Medical Nurse Welfare College 7Department of Speech and Hearing Sciences, Graduate School of International University of Health and Welfare Keyword: 音声障害 , 音声治療 , 言語聴覚士 , エビデンス , システマティックレビュー , voice disorders , voice therapy , speech-language-hearing therapist , evidence , systematic review pp.175-193
Published Date 2025/1/31
DOI https://doi.org/10.11477/mf.134958280220050175
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 Objective:This systematic review aimed to address the research question (RQ):“Is there evidence for the effectiveness of voice therapy conducted by speech-language-hearing therapist in Japan for voice disorders?”

 Methods:Based on the RQ, eligibility criteria were established, and literature was collected through searches in Ichushi-Web, Isho.jp, Medical Online, PubMed, and hand searches. Primary and secondary screenings were conducted, and the quality of the selected studies was evaluated.

 Results:A total of 39 studies were selected, including 30 in Japanese and 9 in English. Among these, there were 2 randomized controlled trials, 6 non-randomized controlled trials, 13 pre-post studies (non-randomized trials), 11 case series, and 7 single-case study designs. By disorder type, there were 10 studies on vocal fold atrophy, 5 on vocal fold paralysis, 4 on vocal polyps and nodules, 11 on functional and spasmodic dysphonia, and 9 on other voice disorders. All studies demonstrated certain effects of voice therapy on voice function and subjective evaluations.

 Conclusion:While voice therapy showed some effectiveness, many studies were pre-post comparisons. In the future, there is a need for research with higher levels of evidence.


Copyright © 2025, Japanese Association of Speech-Language-Hearing Therapists. All rights reserved.

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電子版ISSN 印刷版ISSN 1349-5828 日本言語聴覚士協会

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