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Therapy intensity as an influence factor for speech comprehension in children after sequential bilateral
cochlear implantation
Illg A. , Sandner C. , Büchner A. , Lenarz T. , Lesinski-Schiedat A.
Medizinische Hochschule Hannover, HNO/ DHZ, Hannover, Germany
A lot of children get sequential bilateral cochlear implantations (CI). The results of both implantations show high
variability. Retrospective analysis can search for predictors and influence factors for the results in every single
side. The data of 251 congenital deaf children aged between 4 and 18 years were analyzed. All children got their
devices between 1995 and 2011 at Medical University of Hannover. The inter-implant-interval is between 2
month and 14 years. The patients were required to have experience with the second CI for at least one year. All
patients get Hearing- and Speechtherapy in Cochlear Implant Centers. Depending on their age they get early
intervention at home and some children get additionally physiotherapy or/ and ergotherapy. So, all patients got
different therapy depending on their needs. The most recent data for each implanted side were evaluated.
The performed statistically tests (performed) were one factor analysis of variance (ANOVA) followed by the
Scheffé Post-Hoc-Test, the Wilcoxon test followed by Bonferroni correction and the Spearman´s-Rho correlation
coefficient. The mean results in monosyllabic speech understanding (FET) are 66% in the first implanted side, in
the second side 44%. Mean results in the HSM-sentence test are 75% in the first side and 45% in the second
side. The mean results in HSM sentence test in noise are in the first side 30% and in the second side 14%.
Depending on the therapy form the intensity differs and shows correlations to the speech test results. After
implantation second side hearing therapy intensity is in mean almost half of the first side. Further analyses will
show the correlation between quality of speech understanding and the inter-implant-interval, duration of wearing
the speech processor and will be presented.