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【medical-news】研究显示老年易同时发生耳聋和目
Going deaf and blind happens simultaneously in old age
Medical Studies/Trials
Published: Wednesday, 11-Oct-2006
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According to Australian scientists, vision and hearing loss happens almost simultaneously in older people.
The researchers arrived at this conclusion after examining 1,911 adults living in the Blue Mountains region, west of Sydney, in New South Wales.
The participants had an average age of 70, and among the group, 178 had a visual impairment, categorised as eyesight worse than 20/40, 56 had 'best-corrected' visual impairment, meaning even when using glasses or contact lenses their eyesight was worse than 20/40 and 206 of this combined group also had a hearing problem.
They found the volunteers with restricted eyesight were more likely to suffer hearing impairments and vice-versa.
It is common for people to experience dual sensory impairment or deaf-blindness in their old age and the researchers suspect the underlying causes for these sensory impairments may be the same.
Five years after the original study, between 1997 and 1999, participants, then age 55 to 98, underwent a medical interview along with vision and hearing examinations.
The researchers discovered that, for each line of the eye chart used by ophthalmologists that a participant could not see, there was an 18% (for the visually impaired) and 13% (for the best-corrected visually impaired) increase in the likelihood of hearing loss.
Those in the group that suffered hearing loss were 1.5 times more likely to have eyesight problems than those with good hearing.
The researchers also found that both those suffering age-related macular degeneration and cataracts were more likely to suffer hearing loss than those without these disorders.
The authors, from the University of Sydney and the National Acoustics Laboratories, Sydney, said the connection between vision and hearing could be explained by the fact that both are consequences of ageing and suggest common risk factors can predispose people to such sensory impairments.
They believe exposure to oxidative stress, cigarette smoking and atherosclerosis and its risk factors, have been linked respectively to age-related macular degeneration, cataract and hearing loss.
Diabetes is also a common risk factor for cataract and visual and hearing impairments.
Study leader Ee-Munn Chia, M.B.B.S., and colleagues say that irrespective of the cause of sensory impairment, the two impairments were found to significantly affect both physical and mental well being.
They say further studies are needed to understand the relationship between visual and hearing impairments in older persons and to determine whether intervention to improve these impairments could delay biologic aging.
The study is published in the October issue of Archives of Ophthalmology, one of the JAMA/Archives journals. 我来试试 老人易同时发生耳聋和目盲
According to Australian scientists, vision and hearing loss happens almost simultaneously in older people.
The researchers arrived at this conclusion after examining 1,911 adults living in the Blue Mountains region, west of Sydney, in New South Wales.
根据澳大利亚科学家的研究，老人容易同时发生耳聋和目盲。这项结论是检查了新南威尔士州的悉尼西部蓝岭地区1911名成年人后得出的。
The participants had an average age of 70, and among the group, 178 had a visual impairment, categorised as eyesight worse than 20/40, 56 had 'best-corrected' visual impairment, meaning even when using glasses or
contact lenses their eyesight was worse than 20/40 and 206 of this combined group also had a hearing problem.
研究对象平均年龄为70岁。其中178名有视力缺损，视力低于20/40；56名即使在得到最好的矫正措施后仍然存在视力缺损，他们的视力即使使用镜片或隐形眼镜仍然低于20/40。而这234名视力缺损的研究对象中，共有206名还同时存在听力障碍。
They found the volunteers with restricted eyesight were more likely to suffer hearing impairments and vice-versa.
科学家们发现，视力受限的志愿者更容易发生听力损害，反之亦然。
It is common for people to experience dual sensory impairment or deaf-blindness in their old age and the researchers suspect the underlying causes for these sensory impairments may be the same.
老人们发生双重的感觉障碍或者聋盲同存的情况很是常见，因此研究人员推测在这些感觉损害的背后，真正病因可能是同一个。
Five years after the original study, between 1997 and 1999, participants, then age 55 to 98, underwent a medical interview along with vision and hearing examinations.
初始研究完成5年后，在1997至1999年间，研究对象接受了回访，同时检查了视力和听力。此时，他们的年龄在55至98岁之间。
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作者:admin@医学,生命科学 2010-11-26 05:11
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