Abstract
Purpose
Due to the demographic shift, the number of older people suffering from hearing loss and from cognitive impairment increases. Both are closely related and hard to differentiate as most standard cognitive test batteries are auditory-based and hearing-impaired individuals perform worse also in non-auditory test batteries. Therefore, reference data for hearing-impaired are mandatory.
Methods
The computer-based battery ALAcog assesses multiple cognitive domains, such as attention, (delayed) memory, working memory, inhibition, processing speed, mental flexibility and verbal fluency. A data set of 201 bilaterally hearing-impaired subjects aged ≥ 50 (mean 66.6 (SD 9.07)) was analysed. The LMS method, estimated curves for the 10th, 25th, 50th, 75th and 90th percentile were calculated, and classified according to age, starting from the age of 50.
Results
Cognitive function shows a decline in all subtests as people age, except for verbal fluency, which remains almost stable over age. The greatest declines were seen in recall and delayed recall and in mental flexibility. Age and hearing ability did not correlate (p = 0.68). However, as people age, inter-subject variability of cognitive test results increases. This was especially the case for inhibition. Cognitive function was not correlated with hearing ability (each p ≥ 0.13).
Conclusion
The present results make an approach to establish reference data for a comprehensive non-auditory test battery in a large sample of elderly hearing-impaired people which can be used as a simple tool to better contextualise cognitive performance beyond mean and median scores.
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Data availability
The full data set building up the results of this study are not openly available. The corresponding author provides detailed information upon her discretion if requested. Data are stored at the comprehensive hearing centre, Ruhr-University Bochum, Germany.
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Acknowledgements
We are thankful to Ludger Blanker, ALA Institute, for technical support and would like to acknowledge the former medical students Robert Käppeler, Janine Müther and Marcel Bajewski for data collection and the support of the patients and of the staff of the Comprehensive Hearing Center of the Ruhr-University Bochum for study participation.
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CV and LG designed the study. MF provided the ALAcog test battery. LG collected part of the data. NT and FS did the statistical analysis. CV and LG wrote the manuscript with contributions and critical feedback from MF, NT and IH. All authors contributed to the article and approved the submitted version.
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The ethics institution of the Ruhr-University Bochum approved this study (No. 16-5727-BR). Written informed consent was obtained by all participants and the study meets the guidelines of the Declaration of Helsinki. The authors have no conflict of interest to declare.
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Götze, L., Sheikh, F., Haubitz, I. et al. Evaluation of a non-auditory neurocognitive test battery in hearing-impaired according to age. Eur Arch Otorhinolaryngol 281, 2941–2949 (2024). https://doi.org/10.1007/s00405-023-08408-9
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DOI: https://doi.org/10.1007/s00405-023-08408-9