Barriers to Early Progress in Adult Cochlear Implant Outcomes.
Mathieu Marx, Marie-Laurence Laborde, Carol Algans and 2 others
PMID 39129126WHAT IT FOUND
Adult cochlear implant users who understood fewer than 90% of words in sentences at 1 month were more likely to have detectable thinking or peripheral limiting factors.
Early scores may flag who needs closer follow-up.
Key findings
01At about 1 month, the median sentence recognition score in quiet was 84% correct words, and 13 of 32 participants scored 90% or higher.
02Participants who scored below 90% at 1 month were more likely to have identified limiting factors than participants who scored 90% or higher.
03One-day sentence scores below 57.5% were less likely to reach long-term speech-in-noise performance better than 3 dB.
STILL TO COME
How it was doneWhat they foundWhat it means for SLPs
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What it does not show
This was a single-centre study of 32 French-speaking adults, so the results may not apply to other languages or populations. The study was observational and did not test whether any rehabilitation, programming change, or diagnostic battery improved outcomes. Limiting factors were inferred from test scores outside normal or extreme ranges, not from a definitive diagnosis, and some abnormal tests did not always match later performance. Some participants had missing data, and five participants had no valid peripheral test results because of insufficient response amplitude or absent neural response. Follow-up timing varied; 1-month scores were taken from 15 days to 2 months after activation, partly because of the pandemic. The MoCA was given with visual support and may not be valid for people with severe hearing loss without modification. Normal-population cutoffs for cognitive and peripheral tests may misclassify CI recipients, and larger samples are needed to refine limits. The study did not use comorbidity data or post-implant hearing aid use, which could affect speech understanding.
The easy way to misread this
Do not read a score below 90% at 1 month as proof that a patient will fail to improve or that a specific rehabilitation or programming change will help. The study only linked low early scores with abnormal neurocognitive or peripheral test results in 32 French-speaking adults, and it did not test treatment effects.