PP803 - Early Speech Perception as a Predictor of Long-Term Outcomes in Adult Cochlear Implant Users

Abstract:
This study examines early and long-term auditory outcomes in 84 adult cochlear implant (CI) recipients to identify predictors of success. CNC word recognition scores were analyzed at 3 and 12 months post-implantation. At 3 months, the average score was 56.5%, improving to 68.4% at 12 months. A strong positive correlation (r = 0.72) between scores suggests early performance predicts long-term success. High early scores were linked to consistent improvements, while poor early outcomes limited progress. Tailored interventions, including precise programming and comprehensive rehabilitation, are crucial for maximizing gains, underscoring the importance of early assessment and individualized care in adult users.

Summary:
Introduction
Cochlear implants (CIs) have become the standard treatment for severe-to-profound sensorineural hearing loss, providing substantial improvements in speech perception and communication abilities for adults. Despite their effectiveness, outcomes in adult CI users can be highly variable, influenced by factors such as age at implantation, duration of deafness, and preoperative hearing abilities. Identifying early predictors of long-term success is critical for guiding clinical management and optimizing rehabilitation strategies. This study explores the relationship between early and long-term auditory outcomes by analyzing CNC word recognition scores at 3 and 12 months post-implantation. The goal is to determine whether early performance can reliably predict long-term auditory success, highlighting the value of early intervention and tailored rehabilitation.

Methods
This longitudinal study included 84 adult CI recipients, with a mean age of 61.5 years (SD = 14.5) at the 3-month follow-up. Participants were assessed at 3 months and 12 months post-activation which occurred between 2 and 4 weeks after implantation. CNC word recognition tests were used to evaluate speech perception, with the highest score from each visit included in the analysis. Descriptive statistics and correlation analyses were employed to assess changes in performance and the relationship between early and later outcomes.

Results
At 3 months post-implantation, the average CNC word recognition score was 56.5% (SD = 30.4%), ranging from 0% to 96%. Quartiles were: Q1 = 35.5%, median = 65.0%, and Q3 = 80.0%. By 12 months, average scores improved significantly to 68.4% (SD = 30.3%), with a wider range from 0% to 100%. Quartiles were: Q1 = 52.0%, median = 78.0%, and Q3 = 94.0%. The strong positive correlation (r = 0.72) between 3- and 12-month scores indicates consistent improvements over time. Participants who performed well at 3 months typically maintained strong performance at 12 months, while those with poor early scores showed limited progress. This suggests that factors affecting early outcomes are critical in shaping long-term auditory performance.

Brief Summary of Clinical Takeaways:
The significant correlation between 3- and 12-month word recognition scores underscores the importance of focusing on early auditory outcomes to predict and enhance long-term success in adult CI recipients. Tailored interventions, including precise MAP programming, patient-specific education, and comprehensive aural rehabilitation, are essential to optimize early auditory performance. By prioritizing these strategies, clinicians can help maximize speech perception gains and improve quality of life for adult CI users. The study’s findings also highlight the need for future research into pre-operative and demographic factors that may influence long-term outcomes, aiming to refine patient selection criteria and develop more targeted rehabilitation protocols.