Idiopathic Sudden Sensorineural Hearing Loss: Speech Intelligibility Deficits Following Threshold Recovery.
Masahiro Okada, Aravindakshan Parthasarathy, D Bradley Welling and 2 others
PMID 33259444WHAT IT FOUND
After sudden hearing loss recovered, word recognition remained worse than expected from the hearing thresholds.
Some patients had asymmetric word scores even when thresholds returned to pre-onset levels.
Key findings
01Word recognition on the affected ear improved after sudden hearing loss but remained lower than the other ear.
02Measured word recognition was worse than predicted from the audiogram, indicating an intelligibility deficit beyond audibility.
03Among 58 patients with symmetrical hearing thresholds at the last visit, 8 still had significant word-score asymmetry.
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-center retrospective chart review, not a controlled trial. There was no equal-size untreated control group; only 11 patients received no treatment. Treatment was not randomly assigned, so differences between steroid methods cannot be interpreted as effects of the treatment. There was no hearing test before sudden hearing loss onset, so the opposite ear was used as the reference. Word scores were obtained in quiet, so real-world listening difficulty may be underestimated. The study cannot prove cochlear synaptopathy or another specific cause of the word-recognition deficit.
Declared interests
The supplied text does not include an author conflict-of-interest statement. The publication type lists NIH extramural research support.
The easy way to misread this
Do not read this as proof that steroids improved hearing or that recovered thresholds mean normal speech. The study did not randomise treatment, only a small group was untreated, and word recognition remained worse than expected even when thresholds looked recovered.