Abstract
Objective
To determine tinnitus prevalence and severity in a cohort of unselected first-time cochlear implant (CI) recipients whose primary motive for CI was sensorineural hearing loss (SNHL), and to evaluate the effect of CI on tinnitus after cochlear implantation.
Methods
Prospective longitudinal study of 45 adult CI recipients with moderate to profound SNHL. Patients completed the Danish version of the Tinnitus Handicap Inventory (THI) and a visual analogue scale (VAS) for tinnitus burden before implantation, 4 months after implantation and 14 months after implantation.
Results
The study included 45 patients, of which 29 (64%) had pre-implant tinnitus. Median THI score (IQR) significantly decreased from 20 (34) to 12 (24) at first follow-up (p < 0.05) and to 6 points (17) at second follow-up (p < 0.001). Median VAS (IQR) for tinnitus burden decreased from 33 (62) to 17 (40; p = 0.228) and 12 (27, p < 0.05) at the first and second follow-ups, respectively. Tinnitus was totally suppressed in 19% of patients, improved in 48%, remained unchanged in 19% and worsened in 6%. 2 patients reported new tinnitus. At the second follow-up, 74% of patients had slight or no tinnitus handicap, 16% had mild handicaps, 6% had moderate handicaps, and 3% had severe handicaps. High pre-implant THI and VAS scores correlated with greater decrease in THI scores over time.
Conclusion
64% of the patients with SNHL had pre-implant tinnitus, which was decreased 4 and 14 months after implantation. Overall, 68% of patients with tinnitus improved their tinnitus handicap after CI. Patients with higher THI and VAS scores had a larger decline and the highest benefits in terms of tinnitus handicap improvement. The study findings demonstrate that the majority of patients with moderate to profound SNHL eligible for cochlear implantation benefit from complete or partial tinnitus suppression and improved quality of life after implantation.
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Code availability
All codes for data cleaning and analysis associated with the current submission are available in OSF at https://osf.io/25azh/?view_only=cd198a9c61bc46929b7359572db67523.
Availability of data and materials
All data generated or analysed during the study are included in this published article and presented in Table 2. The anonymized full datasets are available upon reasonable request from the corresponding author.
Abbreviations
- CI:
-
Cochlear implant
- dB HL:
-
Decibel hearing level
- HA:
-
Hearing aid
- NCIQ:
-
Nijmegen cochlear implant questionnaire
- PTA6:
-
Pure-tone audiometry average for six frequencies
- SNHL:
-
Sensorineural hearing loss
- SRS:
-
Speech reception score
- SSQ-12:
-
Speech, Spatial, and Qualities of Hearing Scale
- THI:
-
Tinnitus Handicap Inventory
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K.R. has received a research grant from the William Demant Foundation.
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The study was approved by The Danish National Committee on Health Research Ethics (H-17034918) and The Danish Data Protection Agency (RH-2017-308).
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Rasmussen, K.D., West, N.C., Bille, M. et al. Tinnitus suppression in a prospective cohort of 45 cochlear implant recipients: occurrence, degree and correlates. Eur Arch Otorhinolaryngol 280, 4073–4082 (2023). https://doi.org/10.1007/s00405-023-07921-1
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DOI: https://doi.org/10.1007/s00405-023-07921-1