Long Term Outcomes of Early Cochlear Implantation in Korea

다국어 초록 (Multilingual Abstract)

Objectives. The 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.
Methods. Eighty-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.
Results. When 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.
Conclusion. Early 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.

다국어 초록 (Multilingual Abstract)

Objectives. The 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.
Methods. Eighty-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.
Results. When 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.
Conclusion. Early 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.

참고문헌 (Reference)

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