Clinical and Experimental Otorhinolaryngology (Sep 2009)

Long Term Outcomes of Early Cochlear Implantation in Korea

  • Myung-Whan Suh,
  • Eung Kyung Cho,
  • Bong Jik Kim,
  • Sun O Chang,
  • Chong Sun Kim,
  • Seung-Ha Oh

DOI
https://doi.org/10.3342/ceo.2009.2.3.120
Journal volume & issue
Vol. 2, no. 3
pp. 120 – 125

Abstract

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ObjectivesThe objective of this study was to compare the long-term auditory performance and language skill depending on the age of cochlear implantation in the Korean population. We especially tried to separate the effect of maturation/development from that of the age at implantation.MethodsEighty-six pre-lingual children with profound hearing loss who underwent a cochlear implantation before the age of six and had been followed for more than 3 yr were included in this study prospectively. Categories of Auditory Performance (CAP) and Korean Picture Vocabulary Test (K-PVT) were serially followed up. In order to separate the age at implantation effect, K-PVT results were readjusted to the child's chronological age in the normal hearing population.ResultsWhen the CAP and K-PVT scores were directly compared without chronological readjustment, we failed to show a significant difference for improvements according to the age at implantation. Early cochlear implantation was associated with better language development, only when the K-PVT scores were readjusted to percentile scores of their chronological age.ConclusionEarly cochlear implantation was associated with better language development even within the critical period. This advantage may be recognized only when the effect of the age at implantation is separated from the effect of maturation/development.

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