Abstract
Background Speech changes occur in the early stages of Parkinson's disease (PD) and cause communication difficulties, leading to social isolation. Lee Silverman voice treatment (LSVT) is a speech therapy approach designed to improve patients' language and voice capabilities. Objective The effectiveness of the LSVT was compared with that of other speech interventions or no treatment to evaluate PD patients with dysarthria. Design Systematic review with meta-analysis of randomized trials. Data Sources: PubMed, Embase, Cochrane Library, CNKI, and SinoMed library were searched from inception to December 2021 related to PD and LSVT. Method s were screened and reviewed against the eligibility criteria (intervention group participants were PD assessed based on LSVT (LSVT Loud) and randomized control). Result Ten randomized controlled trials were identified on speech symptoms in patients with PD. Compared with the respiratory therapy (RET) exercise, or no training group, a significant improvement was detected in the sound press level (SPL) after immediate treatment during the reading of vowel and rainbow passages and an increase in semitone standard deviation (STSD). Furthermore, the LSVT training significantly increased the participants' scores on unified Parkinson's disease rating scale (UPDRS-III) and speech intelligibility. Conclusion This meta-analysis demonstrated the efficacy of LSVT in increasing vocal loudness and functional communication among individuals with PD. However, most studies included participants with mild-moderate PD. Thus, additional randomized controlled trials (RCTs) with large sample sizes are needed to validate the efficacy of LSVT in patients with different progressions of PD, including severe PD.
Highlights
Parkinson’s disease (PD) is characterized by the loss of dopamine neurons, leading to motor and nonmotor dysfunction [1]
We have demonstrated that PD patients have head tremble, facial expressions, and speech disorders [5–7]
Inclusion criteria were as follows: (1) All trial types are limited to randomized controlled trials (RCTs); (2) patients’ age, sex, drug type, duration of illness, duration of treatment, and voice handicap index (VHI) were not limited, but only included the PD patients who met the UK Parkinson’s disease society bank criteria; (3) intervention: Lee Silverman voice treatment (LSVT); (4) control group: using other speech disorder treatments or no intervention measures; and (5) main outcomes include sound press level (SPL) and VHI, and the secondary outcomes consist of the semitone standard deviation (STSD), unified Parkinson’s disease rating scale-III (UPDRS-III)–speech item score and speech intelligibility. e exclusion criteria were no outcomes described, no control groups, or animal experiments (Figure 1)
Summary
Speech changes occur in the early stages of Parkinson’s disease (PD) and cause communication difficulties, leading to social isolation. Lee Silverman voice treatment (LSVT) is a speech therapy approach designed to improve patients’ language and voice capabilities. E effectiveness of the LSVT was compared with that of other speech interventions or no treatment to evaluate PD patients with dysarthria. Systematic review with meta-analysis of randomized trials. Abstracts were screened and reviewed against the eligibility criteria (intervention group participants were PD assessed based on LSVT (LSVT Loud) and randomized control). Ten randomized controlled trials were identified on speech symptoms in patients with PD. Is meta-analysis demonstrated the efficacy of LSVT in increasing vocal loudness and functional communication among individuals with PD. Us, additional randomized controlled trials (RCTs) with large sample sizes are needed to validate the efficacy of LSVT in patients with different progressions of PD, including severe PD Most studies included participants with mild-moderate PD. us, additional randomized controlled trials (RCTs) with large sample sizes are needed to validate the efficacy of LSVT in patients with different progressions of PD, including severe PD
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