Ge Jian, He Mingguang, Zhao Jialiang, Fang Min, Ellwein Leon B, He Ning, Yang Mei, Wang Yu, Gao Xuecheng
Zhongshan Ophthalmic Center, Sun Yat-sen University,Guangzhou 510060, China.
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Zhonghua Yan Ke Za Zhi. 2014 Mar;50(3):167-72.
To investigate the prevalence of blindness and moderate and severe visual impairment among adults aged 50 years or above in Yangxi County of Guangdong Province, China.
It was a population-based cross-section study.Geographically defined cluster sampling was used in randomly selecting 5 531 individuals aged 50 years or above in Yangxi County from September 2006 to January 2007. The survey was preceded by a pilot study where operational methods were refined and quality assurance evaluation was carried out. All participants were enumerated using village registers followed by door-to-door visits.Eligible individuals were invited to receive visual acuity measurement and eye examination.Statistical analyses were performed using Stata/SE Statistical Software, release 9.0. Chi-square test was used to investigate the association of age, gender and education with presenting and best corrected visual acuity.
Five thousands five hundreds and thirty-one individuals were enumerated and 4 589 persons were examined, the response rate was 82.97%. Based on the criteria of World Health Organization visual impairment classification in 1973, the prevalence of blindness and moderate and severe visual impairment defined as best corrected visual acuity was 2.38% (109/4 589) and 9.44% (433/4 589) respectively. The prevalence of blindness and moderate and severe visual impairment defined as presenting visual acuity was 2.68% (123/4 589) and 18.15% (833/4 589) respectively. The prevalence of blindness and moderate and severe visual impairment was higher in aged (trend χ(2) = 1 239.34, P < 0.01) , female (χ(2) = 37.88, P < 0.01) and illiterate (trend χ(2) = 235.11, P < 0.01) persons. Cataract was the first leading cause of blindness and visual impairment.
The prevalence of blindness and moderate and severe visual impairment is higher among older adults aged 50 years or above in Yangxi County. Cataract remains as the first leading cause of blindness and visual impairment.
调查中国广东省阳西县50岁及以上成年人失明及中重度视力损害的患病率。
这是一项基于人群的横断面研究。2006年9月至2007年1月，采用地理区域聚类抽样法从阳西县随机选取5531名50岁及以上的个体。在调查之前进行了一项预试验，对操作方法进行了完善并开展了质量保证评估。所有参与者均通过村登记册进行清点，随后进行逐户走访。符合条件的个体被邀请接受视力测量和眼部检查。使用Stata/SE统计软件9.0版进行统计分析。采用卡方检验研究年龄、性别和教育程度与当前视力及最佳矫正视力之间的关联。
共清点出5531名个体，4589人接受了检查，应答率为82.97%。根据1973年世界卫生组织视力损害分类标准，以最佳矫正视力定义的失明及中重度视力损害患病率分别为2.38%（109/4589）和9.44%（433/4589）。以当前视力定义的失明及中重度视力损害患病率分别为2.68%（123/4589）和18.15%（833/4589）。失明及中重度视力损害的患病率在老年人（趋势χ(2)=1239.34，P<0.01）、女性（χ(2)=37.88，P<0.01）和文盲（趋势χ(2)=235.11，P<0.01）中较高。白内障是失明和视力损害的首要原因。
阳西县50岁及以上老年人中失明及中重度视力损害的患病率较高。白内障仍然是失明和视力损害的首要原因。
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