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Relationship between Hearing Loss and Dementia Differs According to the Underlying Mechanism

 Jinsei Jung  ;  Seong Hoon Bae  ;  Ji Hyuk Han  ;  Sang Hyun Kwak  ;  Gi Sung Nam  ;  Phil Hyu Lee  ;  Young Ho Sohn  ;  Mijin Yun  ;  Byung Seok Ye 
 JOURNAL OF CLINICAL NEUROLOGY, Vol.17(2) : 290-299, 2021-04 
Journal Title
Issue Date
Alzheimer's disease ; Lewy body disease ; Parkinson's disease ; cognitive impairments ; hearing loss ; vascular dementia
Background and purpose: The associations between hearing loss (HL) and the mechanisms underlying cognitive impairment (CI) remain unclear. We evaluated the effects of clinical factors, vascular magnetic resonance imaging (MRI) markers, and CI mechanisms on HL. Methods: In total, 112 patients with CI (59% demented) and subjective HL prospectively underwent MRI, amyloid positron-emission tomography (PET), hearing evaluations, and neuropsychological tests including a language comprehension test. Patients were categorized into pure-Alzheimer's disease-related CI (ADCI), pure-Lewy-body disease-related CI (LBCI), mixed-ADCI/LBCI, and non-ADCI/LBCI groups based on clinical features and PET biomarkers. Results: The risk of peripheral HL [defined as a pure-tone average (PTA) threshold >40 dB] was higher in the pure-LBCI group than in the pure-ADCI and mixed-ADCI/LBCI groups, and lower in the presence of ADCI. The non-ADCI/LBCI group had the most-severe vascular MRI markers and showed a higher risk of peripheral HL than did the pure-ADCI and mixed-ADCI/LBCI groups. While the pure-LBCI group had a higher risk of comprehension dysfunction than the pure-ADCI group regardless of the PTA and the score on the Korean version of the Mini Mental State Examination (K-MMSE), those in the pure-LBCI group even with a better K-MMSE score had a risk of comprehension dysfunction comparable to that in the mixed-ADCI/LBCI group due to a worse PTA. Conclusions: Peripheral HL could be associated with the absence of significant β-amyloid deposition in patients with CI and characteristic of the pure-LBCI and non-ADCI/LBCI groups.
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1. College of Medicine (의과대학) > Dept. of Otorhinolaryngology (이비인후과학교실) > 1. Journal Papers
1. College of Medicine (의과대학) > Dept. of Neurology (신경과학교실) > 1. Journal Papers
1. College of Medicine (의과대학) > Dept. of Nuclear Medicine (핵의학교실) > 1. Journal Papers
Yonsei Authors
Bae, Seong Hoon(배성훈) ORCID logo https://orcid.org/0000-0001-9243-9392
Sohn, Young Ho(손영호) ORCID logo https://orcid.org/0000-0001-6533-2610
Ye, Byoung Seok(예병석) ORCID logo https://orcid.org/0000-0003-0187-8440
Yun, Mi Jin(윤미진) ORCID logo https://orcid.org/0000-0002-1712-163X
Lee, Phil Hyu(이필휴) ORCID logo https://orcid.org/0000-0001-9931-8462
Jung, Jinsei(정진세) ORCID logo https://orcid.org/0000-0003-1906-6969
Han, Ji Hyuk(한지혁)
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