Summary
Objective
To map the evidence on vocal intervention in people over 18 years old.
Methods
A literature search was conducted using the following electronic databases: Cochrane
Library, EMBASE, Latin American and Caribbean Literature on Health Sciences (LILACS),
LIVIVO, Pubmed/Medline, Scopus, SpeechBITE, and Web of Science. Gray literature was
also used as an information source through searches on Google Scholar, Open Grey,
ProQuest Dissertation and Thesis, and the Brazilian digital library of theses and
dissertations. Systematic reviews (SR) with a population of individuals over 18 years
old were included. The included reviews addressed speech-language pathology interventions
in the vocal area with reports of their respective outcome. The methodological quality
of the included systematic reviews was analyzed using the AMSTAR II tool. Quantitative
analysis was performed by frequency distribution, and qualitative research was analyzed
through narrative synthesis.
Results
A total of 2,443 references were retrieved, among which 20 studies met the inclusion
criteria. The included studies had critically low quality, lacking the use of population,
intervention, comparison, and outcome (PICO) components. Among the included SRs, 40%
were made in Brazil, 45% were published in the Journal of Voice, and 75% analyzed
dysphonic patients. The most frequent intervention was voice therapy (direct therapy
associated with indirect therapy approaches). Positive results were observed in most
of the outcomes for all studies.
Conclusion
Voice therapy was described as inducing positive effects for voice rehabilitation.
However, due to the critically low quality of studies, the literature did not enable
us to understand the best results for each intervention. Well-designed studies are
necessary to clarify the relationship between the intervention goal and how the intervention
was evaluated.
Key Words
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Article info
Publication history
Published online: May 04, 2023
Accepted:
March 7,
2023
Publication stage
In Press Corrected ProofFootnotes
Funding: None.
Identification
Copyright
© 2023 The Voice Foundation. Published by Elsevier Inc. All rights reserved.
