Effect of Treatment of Hypokinetic Dysarthria in Parkinson's Disease With Speech and Language Therapy: A Meta-Analysis
Iranian Journal of Public Health
Zhang, L. (2025).
Iranian Journal of Public Health, 54(6), 1118-1131.
<div>This systematic review and meta-analysis investigates the effects of speech and language therapy on outcomes for individuals with hypokinetic dysarthria associated with Parkinson's disease.</div>
Fundamental Research Funds for the Central Universities (China)
From database inception to October 2024
<div>Observational, prospective, retrospective, or randomized controlled trials</div>
14
<div>In individuals with hypokinetic dysarthria due to Parkinson's disease, speech and language therapy led to significant improvements in:</div>
<div>
<ul>
<li>sound pressure level for phonation (MD = 7.51);</li>
<li>sound pressure level in reading (MD = 8.83);</li>
<li>sound pressure level in monologue (MD = 4.28);</li>
<li>sound pressure level in picture description (MD = 3.64); and </li>
<li>Voice Handicap Index (MD = -5.61).</li>
</ul>
</div>
<div>The Lee Silverman Voice Treatment program was the most popular speech and language therapy intervention, while respiratory training was used most often as the control treatment. </div>
<div> </div>
<div>Limitations to this review include the potential for selection bias as well as insufficient data regarding patient characteristics of the included studies.</div>
