Abstract
Patients with single-sided deafness (SSD) are limited by their asymmetric hearing in various areas of everyday life. The aim of this investigation was to perform an age-correlated comparison of the hearing threshold of the better ear of SSD patients with anormal-hearing (NH) reference cohort. In addition, the potential influence of etiology, duration of deafness, and cochlear implantation (CI) of the poorer ear on the peripheral hearing ability of the better ear was investigated. In amulticenter study, the mean bone conduction hearing threshold of the better ear of 413adult SSD patients was compared with that of an NH cohort drawn from ISO 7029:2017 for the frequencies0.5, 1, 2, and 4 kHz. SSD patients showed significantly poorer hearing in the better ear compared to the age-correlated group of NH subjects. CI, duration of deafness, and etiology had no significant effect on the hearing ability of the better ear. The origin of the poorer hearing of the better-hearing ear of SSD patients compared to an age-correlated NH cohort is still unclear. It is most likely acombination of different anatomical, immunological, etiological, and microcirculatory causes, which lead to poorer hearing of the better-hearing ear in SSD patients.
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