Auditory and speech outcomes of cochlear implantation in post-meningitis deafness

Abstract

PurposeThis study aims to identify the auditory, speech, and surgical outcomes of cochlear implantation in patients with profound SNHL following bacterial meningitis. MethodsSubjects with bilateral severe to profound SNHL who underwent unilateral cochlear implantation from 2003 to 2020 were included in this historical cohort study. The main outcomes were assessed using Categories of Auditory Performance (CAP) and Speech Intelligibility Ratings (SIR) scores. The CAP and SIR outcomes were collected as three-time points after surgery: 6, 12, and 24 months. In order to achieve the strength of the relationship and for computing the Risk Ratio (RR) by log-binominal regression method, we used two binary categorizations of CAP and SIR in our analyses. ResultsThe mean of age at implantation of the study and control group were 144.30 (156.90) and 121.10 (133.70) months, respectively. In the study group, 19 of 35 (54.3%) patients were male, and 16 (45.7%) were female. In the control group, 34 of 81 (42.0%) patients were male and 47 (58.0%) were female. The mean scores of CAP and SIR in our study improved significantly during the time in both groups. All p-values (p) were significant in both groups (T2 vs T1, T3 vs T1, and T3 vs T2). Our analysis by log-binomial regression and computing the RR based on the first and second categorization of CAP and SIR showed moderate to strong relationships between the presence of a history of meningitis and inappropriate CAP and SIR outcomes in these patients. ConclusionsAlthough subjects who were deafened due to meningitis benefit significantly from cochlear implantation, we found moderate to strong relationships between the history of meningitis and inappropriate CAP and SIR outcomes in these patients.