Clinical and Epidemiologic Research Prevalence of and Risk Factors for Diabetic Retinopathy in a Rural Chinese Population: The Yangxi Eye Study Guangming Jin,1 Wei Xiao,1 Xiaohu Ding,1 Xiao Xu,2 Lei An,2 Nathan Congdon,1,3,4 Jialiang Zhao,5 and Mingguang He1,6 1State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China 2Rehabilitation Administration Department, National Institute of Hospital Administration, Chinese National Health and Family Planning Commission, Beijing, China 3Translational Research for Equitable Eye Care, Centre for Public Health, Royal Victoria Hospital, Queen’s University Belfast, Belfast, United Kingdom 4Orbis International, New York, New York, United States 5Chinese Academy of Medical Sciences, Peking Union Medical College Hospital, Beijing, China 6Centre for Eye Research Australia, Ophthalmology, Department of Surgery, University of Melbourne, Melbourne, Australia Correspondence: Mingguang He, PURPOSE. To investigate the prevalence and determinants of diabetic retinopathy (DR) among Zhongshan Ophthalmic Center, #54 older adults in rural Southern China. Xianlie South Road, Yuexiu District, Guangzhou 510060, People’s Re- METHODS. Using random cluster sampling, persons aged 50 years or older were randomly public of China; selected in rural Yangxi County, Guangdong Province, China. All participants underwent a
[email protected]. standardized interview, fundus photography, and point of service glycosylated hemoglobin Jialiang Zhao, Chinese Academy of A1c (HbA1c) testing. Diabetes mellitus (DM) was diagnosed based on confirmed medical Medical Sciences, Peking Union history or HbA1c ‡6.5%. Fundus photographs were graded for DR and diabetic macular Medical College Hospital, #1 Dong- edema (DME) based on the United Kingdom National Diabetic Eye Screening Program jiaomin Street, Dongcheng District, guidelines.