Lanhua Wang1, Rui Gong2, Stuart Keel3, Zhuoting Zhu1, Mingguang He4. 1. State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China. 2. Ophthalmic Center of The Third Affiliated Hospital of Jinzhou Medical University, Liaoning, China. 3. Centre for Eye Research Australia, University of Melbourne, Melbourne, Australia. 4. State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China; Centre for Eye Research Australia, University of Melbourne, Melbourne, Australia. Electronic address: mingguang.he@unimelb.edu.au.
Abstract
PURPOSE: To estimate the ten-year incidence of cataract surgery and its associated factors in an adult urban Chinese population. DESIGN: Population-based cohort study. METHODS: The Liwan Eye Study is a population-based study initiated in 2003 with 1405 eligible participants. All baseline participants were invited to return for ten-year follow-up examination with the same protocol. Having incident cataract surgery was defined as participants with native crystalline lens at baseline who underwent cataract surgery performed in either eye during the ten-year follow-up period. A detailed questionnaire was administrated to collect information regarding income, education, and medical history of hypertension and diabetes at baseline examination. RESULTS: 791 (86.2%) of 918 eligible survivors attended the ten-year follow-up examination, and 778 participants without prior binocular cataract surgery were eligible for analysis. The overall ten-year incidence of any cataract surgery was 73/778 (9.4%, 95%CI: 7.4∼11.7%). The incident cataract surgery increased with ages, and increased from 1.5% among participants aged 50 to 54 years, to 23.2% for those aged 75 years and older (P<0.001); same trends were also observed for incident unilateral (P<0.001) and bilateral surgery(P<0.001). In multivariate logistic regression model, income more than 1000 RMB (OR=0.2, P=0.023), education level (OR=0.1, P<0.001) and presence of diabetes (OR=3.9, P=0.038) had significant positive effect on cataract surgery incidence. CONCLUSIONS: Approximately 1 in 10 participants older than 50 years underwent cataract surgery over ten years. The incidence was lower than those reported in developed countries, suggesting a substantial unmet demand even in a major urban city in China.
PURPOSE: To estimate the ten-year incidence of cataract surgery and its associated factors in an adult urban Chinese population. DESIGN: Population-based cohort study. METHODS: The Liwan Eye Study is a population-based study initiated in 2003 with 1405 eligible participants. All baseline participants were invited to return for ten-year follow-up examination with the same protocol. Having incident cataract surgery was defined as participants with native crystalline lens at baseline who underwent cataract surgery performed in either eye during the ten-year follow-up period. A detailed questionnaire was administrated to collect information regarding income, education, and medical history of hypertension and diabetes at baseline examination. RESULTS: 791 (86.2%) of 918 eligible survivors attended the ten-year follow-up examination, and 778 participants without prior binocular cataract surgery were eligible for analysis. The overall ten-year incidence of any cataract surgery was 73/778 (9.4%, 95%CI: 7.4∼11.7%). The incident cataract surgery increased with ages, and increased from 1.5% among participants aged 50 to 54 years, to 23.2% for those aged 75 years and older (P<0.001); same trends were also observed for incident unilateral (P<0.001) and bilateral surgery(P<0.001). In multivariate logistic regression model, income more than 1000 RMB (OR=0.2, P=0.023), education level (OR=0.1, P<0.001) and presence of diabetes (OR=3.9, P=0.038) had significant positive effect on cataract surgery incidence. CONCLUSIONS: Approximately 1 in 10 participants older than 50 years underwent cataract surgery over ten years. The incidence was lower than those reported in developed countries, suggesting a substantial unmet demand even in a major urban city in China.