Lee Silverman Voice Treatment for Dysarthria in Patients With Parkinson's Disease: A Systematic Review and Meta-Analysis
European Journal of Neurology
Yuan, F., Guo, X., et al. (2020).
European Journal of Neurology, 27(10), 1957-1970.
This meta-analysis investigates the Lee Silverman Voice Treatment approach for dysarthria in patients with Parkinson's disease.
National Key R&D Program of China; National Natural Science Foundation of China; Natural Science Foundations of Guangdong of China; Leading Talent in Talents Project Guangdong High-level Personnel of Special Support Program (China); Scientific Research Foundation of Guangzhou (China); National Natural Science Foundation of China
Up through March 6, 2020
Randomized controlled trials
9 studies for the qualitative analysis; 8 studies for the meta-analysis
<div>There were no significant difference between remote and face-to-face modalities of LSVT regarding voice outcomes for individuals with PD.</div>
<div>Results indicated that, when compared to the no intervention group, LSVT yielded greater positive effects on vocal loudness immediately after treatment (increase = 6.66 db to 13.39) and 1-month post-treatment (increase = 3.35 dB to 8.87 dB). Additional findings include:</div>
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<li>Significant improvements in voice-related quality of life were reported immediately following treatment for LSVT compared to no treatment group (mean difference = -15.99).</li>
<li>When compared with speech respiratory training, LSVT was indicated to have a better effect on improving the reported voice problems of patients with Parkinson's disease, with statistically significant differences noted at 24 months post-treatment.</li>
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<div>For specific effect sizes of LSVT at various times post-treatment, see Figures 3-5 of the full-text article (p. 1965-1967).</div>
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