The Age Variation of Hearing among Chinese Farmers

中国农民听力的年龄差异

基本信息

批准号：
07045055
负责人：
MIYASHITA Kazuhisa
金额：
$ 1.86万
依托单位：
Wakayama Medical University
依托单位国家：
日本
项目类别：
Grant-in-Aid for international Scientific Research
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1996
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07045055/
关键词：
hearing acuity age-related change hearing level upper limit of hearing normal aging curve difference rural Chinese urban Chinese 地域間隔差

项目摘要

To clarify the effects of environmental noise on the age-related changes in hearing, the joint research between Wakayama Medical University in Japan and Shandong Medical University in China was conducted. The subjects were 1064 male and 1273 female Chinese who were occupationally unexposed to noise ranging in age from 5 to 83 years. Audiometric threshold testing was performed at the audiometric frequencies of 0.5,1,2,4 and 8 kHz. The upper limit of hearing was also measured. The ears of subjects with no evidence of hearing impairment were selected to analyze the hearing level and the upper limit of hearing. The subjects finally accepted comprised 1604 male and 2223 female normal ears. Normal aging curves of hearing level at each frequency and upper limit of hearing were established by calculating the 25th, 50th and 75th percentiles for each age group. The hearing level gradually increased with age and rapidly over 50 years. Deterioration of the upper limit of hearing was observed from early childhood and slight between age 25 and 49 but at ages over 50 it was accelerated. The age-related changes in hearing of Chinese were compared with those of Japanese normal group. Those of Chinese were slower than those of Japanese. When the age-related changes in hearing of urban Chinese were compared with those of rural Chinese. Those of urban Chinese were faster than those of rural Chinese. These differences may be the effects of environmental noise. In this study, 370 subjects (16% subjects) were excluded from the normal groups because of hearing impairment, 223 of them showed sensory hearing loss. Logistic regression analysis was used to analyze the items related to hearing impairment. Odds ratio of otitis media was the highest. This might come from the effect of aminoglycoside antibiotics commonly used to treat otitis media.

为了阐明环境噪声对听力随年龄变化的影响，日本和歌山医科大学和中国山东医科大学进行了联合研究。受试者为 1064 名中国男性和 1273 名中国女性，年龄从 5 岁到 83 岁不等，没有因职业原因接触噪音。听力阈值测试在 0.5、1、2、4 和 8 kHz 的听力频率下进行。还测量了听力的上限。选择无听力障碍证据的受试者的耳朵来分析听力水平和听力上限。最终接受的受试者包括1604名男性和2223名女性正常耳朵。通过计算各年龄组的第25、50、75个百分位数，建立各频率听力水平和听力上限的正常老化曲线。听力水平随着年龄的增长而逐渐提高，50岁以上迅速提高。从幼儿期开始就观察到听力上限下降，25 岁至 49 岁期间听力上限下降轻微，但在 50 岁以上则加速下降。将中国人听力随年龄的变化与日本正常组进行比较。中国人的速度比日本人慢。将中国城市居民与农村居民的听力与年龄相关的变化进行比较。中国城市人的速度比中国农村人快。这些差异可能是环境噪音的影响。在这项研究中，370 名受试者（16% 受试者）因听力障碍而被排除在正常组之外，其中 223 名受试者表现出感觉性听力损失。采用Logistic回归分析法对与听力障碍相关的项目进行分析。中耳炎的几率最高。这可能来自常用于治疗中耳炎的氨基糖苷类抗生素的作用。