The Maximum Phonation Time As Marker for Voice Treatment Efficacy: A Network Meta-Analysis
Clinical Otolaryngology
Barsties, V. , Latoszek B., et al. (2022).
Clinical Otolaryngology, 48(2), 130–138.
This systematic review and meta-analysis investigates the impact of various voice treatments on maximum phonation time in adults with confirmed voice disorders.
Not stated
From database inception to November 19, 2021
Randomized controlled trials
12
<div>Findings demonstrated significant improvements in maximum phonation time following vocal function exercises, with a mean difference (MD) of 6.16. The following treatments resulted in positive, but statistically insignificant, treatment effects:</div>
<ul>
<li>stretch and flow phonation (MD= 4.96);</li>
<li>liuzijue qigong (i.e., a Chinese method of controlled breathing; MD= 4.58);</li>
<li>resonant voice (MD= 4.45);</li>
<li>abdominal breathing support (MD= 2.65);</li>
<li>accent method (MD= 2.33);</li>
<li>vocal hygiene (MD= 1.36); and</li>
<li>finger kazoo (MD= 0.53).</li>
</ul>
<div>It is important to note that this review did not investigate treatment generalization to or impact on any functional voice outcomes. Limitations to this review include significant heterogeneity between included study designs, small sample sizes, and notable risk of bias. Further research is indicated to determine the efficacy of these treatments for individuals with specific voice disorders.</div>
