高齢者の聴力の実態について  [in Japanese] HEARING ACUITY IN THE ELDERLY IN JAPAN  [in Japanese]

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Abstract

厚生省の高齢者の聴力に関する研究班は65歳以上の高齢者の聴力を調査した. 測定7周波数の平均聴力レベルはA群 (65~69歳) で35.0dB, B群 (70~74歳) で42.1dB, C群 (75~79歳) で46. 1dB, D群 (80~84歳) で52. 1dB, E群 (85歳以上) で55.6dBであった. すべてのグループにおいて聴力の男女差はみられず, オージオグラムの型は大部分の例で高音漸傾型を示した. 平均語音弁別能はA群で75.4%, B群で70%, C群で63.8%, D群で59.7%, E群で52.1%, また, SISI検査で70%以上を示した率はA群で45.2%, B群で49.3%, C群で47.9%, D群で51.6%, E群で59.7%であった.

In Japan, the elderly population has progressively increased. It is therefore expected that various social services for the elderly will be demanded. As most of the elderly have hearing impairment due to presbycusis, it is difficult to communicate smoothly with them. To provide the various social services, it is necessary to investigate hearing acuity in the elderly. Accordingly, the Hearing Research Group, which belongs to the Research Project on Aging and Health in the Ministry of Health and Welfare of Japan, investigated the hearing acuity of people 65 years old, or more.<BR>One thousand one hundred ninety two subjects were divided into five groups, Group A consisted of 170 males and 216 females between 65 and 69 years old, Group B, 186 males and 158 females between 70 and 74; Group C, 147 males and 140 females between 75 and 79; Group D, 63 males and 61 females between 80 and 84; and Group E, 29 males and 22 females 85 years old or more. We examined the 175 subjects 80 years old or more. Therefore, it is considered that this study could indicate the present condition of hearing acuity of the elderly of Japan.<BR>The average hearing levels measured at seven frequencies (125, 250 and 500Hz, and 1, 2, 4, and 8KHz) were 35.0dB in group A. 42.1 in group B, 46.1 in group C, 52.1 in group D, and 55.6 in group E. There were no differences in the average hearing level between males and females in any group.<BR>The audiogram pattern indicated a gradually descending curve in most subjects in all groups.<BR>The average speech discrimination rate was 75.4% in group A, 70% in group B, 63.8% in group C, 59.7% in group D, and 52.1% in group E.<BR>The percentage of subjects showing a short increment sensitivity index of more than 70% was 45.2% in group A, 49.3% in group B, 47.9% in group C. 51.6% in group D, and 59.7% in group D.<BR>In conclusion, hearing loss due to aging tended to be more progressive at higher frequencies while hearing acuity of frequencies covering normal speech was preserved. However, the speech discrimination rate decreased relative to changes in the pure tone hearing level. It was considered that the pathology of hearing loss due to aging begins with retrocochlear changes and cochlear factors are added to retrocochlear changes with aging.

Journal

  • Nippon Jibiinkoka Gakkai Kaiho

    Nippon Jibiinkoka Gakkai Kaiho 99(6), 869-874, 1996-06-20

    The Oto-Rhino-Laryngological Society of Japan, Inc.

References:  6

Cited by:  18

Codes

  • NII Article ID (NAID)
    10006826734
  • NII NACSIS-CAT ID (NCID)
    AN00191551
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    00306622
  • Data Source
    CJP  CJPref  J-STAGE 
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