Predictors of audiological outcome following cochlear implantation in adults

Abstract

The objective of this study was to examine variables that may predict open set speech discrimination following cochlear implantation. It consisted of a retrospective case review conducted in a tertiary referral centre with a cochlear implant programme. The patients were 117 postlingually deafened adult cochlear implant recipients. The main outcome measures were Bench, Kowal, Bamford (BKB) sentence scores recorded nine months following implant activation. The variables studied were age at the time of surgery, sex, duration of hearing loss, aetiology of hearing loss, residual hearing, implant type, speech processor strategy, number of active electrodes inserted. Variables found to have a significant effect on BKB following univariate analysis were entered into a multivariate analysis to determine independent predictors. Multivariate ordinal regression analysis gave an odds ration of 1.09 for each additional year of deafness prior to implantation (confidence interval 1.06-1.13; p < 0.001). Duration of deafness prior to implantation is an independent predictor of implant outcome. It accounted for 9% of the variability. Other factors must influence implant performance.

Factors Affecting Outcomes in Cochlear Implant Recipients Implanted With a Perimodiolar Electrode Array Located in Scala Tympani

“…Curiously, PC1 Age was the only factor significantly correlated with speech recognition for this group. Age has been shown to correlate with outcomes in some studies (1,3,25,26) while others have shown no relation (2,5,12,27). Eighteen participants in the current study were ≥65 years of age (Mean = 74 years, Range = 65 – 83 years); their average pre-operative CNC score was 8.4%, and their average CNC score obtained during the study was 72%.…”

“…Participants’ word scores ranged from 52% – 94% and sentence scores ranged from 36 – 99%. Previous studies that relate duration of SPHL to unilateral CI speech recognition in quiet reported individual scores that spanned the range of all possible scores (2,3,5,6,27). Lastly, PC3 Pre-op Hearing (pre-operative four-frequency PTA and hearing level at 250 Hz) did not correlate with outcome measures.…”

Multi-channel cochlear implant histopathology: Are fewer spiral ganglion cells really related to better clinical performance?

“…Many studies have been done trying to find predictors of clinical performance such as age at time of implantation, duration of deafness, etiology of deafness, and handedness, with a definitive relationship of improved speech perception only with preoperative CID sentence scores and duration of deafness [1,12,13]. It is well described in the literature that prelingual children and post-lingually deaf adults benefit the most from cochlear implantation [11].…”

A predictive model for outcome of cochlear implantation in children below the age of 5 years: A multivariate analysis in Indian scenario

“…This is commensurate with the past studies in the literature. [2][3][4][5][6][7][8] The shorter the period of time from the identification of deafness to the time of cochlear implantation, the easier it tends to be to develop spoken language. It appears that the less time the auditory channels remain dormant and unused, the greater the chance for these pathways to be ready and open to accept the new incoming information available through the cochlear implant.…”