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Lanhua Wang, Qiuxia Yin, Wenyong Huang, Shengsong Huang, Decai Wang, Mingguang He; Five-Year Incidence of Clinically Significant Cataract in Urban Southern China: The Liwan Eye Study. Invest. Ophthalmol. Vis. Sci. 2014;55(13):1562.
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© ARVO (1962-2015); The Authors (2016-present)
To determine five-year incidence of clinically significant cataract and its risk factors in an elderly urban Chinese population
Participants underwent a comprehensive eye examination at baseline in 2003 and then five years later. Clinically significant cataract was defined as people with lens opacity and best-corrected visual acuity (BCVA) > 20/63 in both eyes at baseline in 2003 but decreased to <20/63caused by cataract in either eyes at follow-up in 2009, or those with cataract surgery performed between baseline and 5-year follow up visits.
Among 1405 baseline participants, 924 (75.0%) of 1232 survivors participated in the 5-year follow-up. The incidence of clinically significant cataract was 3.45% (17 cases) among the persons aged less than 65 years whereas this incidence increased to 23.9% (72 cases) among the participants > 65 years (p < 0.001), with an overall incidence of 11.2% (95% confidence interval [CI] 9.20% ~ 13.6%). In univariable analysis, incidence of cataract increased significantly with older age (P < 0.001),less BMI( p=0.036)and less education (P < 0.001), but not associated with gender, income status, hypertension and diabetes. In multivariate logistic regression models, incidence of cataract was significantly associated with age (p<0.001)and BMI(p=0.038).
The incidence of clinically significant cataract is high in urban Chinese. These data may help the public health planner to estimate the demand of cataract surgery service in the community.
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