Impact of Duration of Hearing Loss on Hearing Performance of Post-Lingual Cochlear Implant Users

Document Type : Original Article


1 Associate Professor of Otolaryngology.Hearing and Speech Research Center, Imam Khomeini Hospital, Ahvaz Jundishapur University of Medical Science, Ahvaz, Iran.

2 Rehabilitation Administration Student.Muschuloskeletal Rehabilitation Research Center, Department of Rehabilitation Sciences, Ahvaz Jundishapur University of Medical Science, Ahvaz, Iran.

3 Assistant Professor of Audiology.Muschuloskeletal Rehabilitation Research Center, Department of Rehabilitation Sciences, Ahvaz Jundishapur University of Medical Science, Ahvaz, Iran.

4 Assistant Professor of Biostatistic.Department of Biostatistics and Epidemiology, School of Public Health, Ahvaz Jundishapur University of Medical Science, Ahvaz, Iran.


Background and Objective: A variety of factors have been shown to influence cochlear implant (CI) outcomes, such as age at implantation, residual hearing, the etiology of deafness and duration of hearing loss. This study was conducted to assess the impact of hearing loss duration on hearing performance of CI users.
Subjects and Methods: During an analytic cross-sectional study, 70 post-lingual CI recipients (mean age:35.48 )  participated. They were selected from 4 different CI centers in Iran, including Ahvaz, Shiraz, Mashhad and Tehran centers. Hearing performance in patients was evaluated using HISQUI19 questionnaire. For data analysis, CI patients were classified into two groups: less than 20 years duration of hearing loss (group 1) and more than 20 years duration of hearing loss (group 2).
Results: The mean HISQUI19 score was 78.2 ± 21.47, reflecting moderate performance after CI. The mean HISQUI19 score for group 1 and group 2 was 79.36±2.13 and 72.66 ± 2.33, respectively which was not statistically significant (Independent sample t-test, p=0.564).
Conclusion: It seems that duration of hearing loss has not significant effect on hearing performance of postlingually deaf  adults after CI.


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