Abstract
To characterize the acquisition parameters, analysis, and results of the frequency-following response (FFR) in cochlear implant users. The search was conducted in Cochrane Library, Latin American and Caribbean Health Sciences Literature (LILACS), Ovid Technologies, PubMed, SciELO, ScienceDirect, Scopus, Web of Science, and gray literature. Studies on FFR in cochlear implant users or that compared them with normal-hearing people, with no restriction of age, were included. Secondary and experimental studies were excluded. There was no restriction of language or year of publication. The data were analyzed and reported according to the stages in the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA), 2020. The methodological quality was analyzed with the Joanna Briggs Institute Critical Appraisal Checklist for Analytical Cross-Sectional Studies. Divergences were solved by a third researcher. Six studies met the inclusion criteria. Only one study was comparative, whose control group comprised normal-hearing people. The variations in acquisition parameters were common and the analysis predominantly approached the time domain. Cochlear implant users had different FFR results from those of normal-hearing people, considering the existing literature. Most articles had low methodological quality. There is no standardized FFR acquisition and analysis protocol for cochlear implant users. The results have a high risk of bias.
Highlights
Fonte de financiamento: Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - Brasil (CAPES) Código de Financiamento 001
Research strategies: The search was conducted in Cochrane Library, Latin American and Caribbean Health Sciences Literature (LILACS), Ovid Technologies, PubMed, SciELO, ScienceDirect, Scopus, Web of Science, and gray literature
Selection criteria: Studies on frequency-following response (FFR) in cochlear implant users or that compared them with normal-hearing people, with no restriction of age, were included
Summary
Fonte de financiamento: Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - Brasil (CAPES) Código de Financiamento 001. Características dos estudos, método de análise, resultados e possível efeito das variáveis de categorização no FFR de usuários de IC
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