Cochlear Implant Outcomes in Patients With Severe Compared With Profound Hearing Loss

Area of Science:

• Audiology
• Neurosurgery
• Otolaryngology

Background:

• Cochlear implantation (CI) is a treatment for severe to profound hearing loss.
• Understanding speech perception outcomes based on preoperative hearing loss severity is crucial for patient selection.

Purpose of the Study:

• To compare speech perception results in adult cochlear implant recipients with severe versus profound preoperative hearing loss.
• To evaluate the impact of preoperative hearing loss severity on CI outcomes.

Main Methods:

• Retrospective review of adult CI recipients (16+ years) who underwent surgery between 2008-2015.
• Analysis of speech perception scores (CUNY sentences, CNC/CVC words) at preoperative, 3, 6, and 12 months postoperatively.
• Statistical comparison using Mann-Whitney U test and interquartile analysis.

Main Results:

• Patients with severe hearing loss demonstrated significantly better speech perception scores than those with profound hearing loss at preoperative, 6, and 12 months (p < 0.001).
• No significant difference was observed at 3 months postoperatively.
• At 12 months, the lower quartile for CUNY sentences was 83% for severe and 75% for profound groups; for words, it was 32% and 26%, respectively.

Conclusions:

• Adult cochlear implant recipients experience significant speech perception improvements.
• Severe preoperative hearing loss is associated with superior speech perception outcomes compared to profound hearing loss after CI.
• Findings support the refinement of cochlear implant candidacy criteria to optimize patient selection and outcomes.