title: Design and baseline characteristics of a population-based study of eye disease in southern Chinese people: the Dongguan Eye Study.
abstract: BACKGROUND
  To describe the study design, methodology and baseline characteristics of the Dongguan Eye Study.
  
  
  METHODS
  Population-based, cross-sectional study
  
  
  METHODS
  A total of 8952 rural-dwelling residents aged 40 years or older in Hengli, Dongguan.
  
  
  METHODS
  The Dongguan Eye Study was conducted from September 2011 to February 2012. The interview covered demographic data, socio-economic status and health- and vision-related quality of life. Physical measurements included height, weight, waist and hip circumference, heart rate and blood pressure. Laboratory tests included fasting blood glucose, haemoglobin A1c, oral glucose tolerance, serum total cholesterol, triglycerides, high-density lipoprotein-cholesterol, low-density lipoprotein-cholesterol, serum creatinine, blood urea nitrogen and uric acid. Ophthalmic examinations included visual acuity and autorefraction testing, intraocular pressure measurement, slit-lamp examination, ocular biometry, gonioscopy, fundus photography, retinal nerve fibre layer imaging and visual field testing.
  
  
  METHODS
  Prevalence and risk factors for visual impairment, blindness, eye diseases and their associations with systemic medical indicators or health-related lifestyles, as well as epidemiological data on diabetic subjects. Methodology, response rates and baseline characteristics are presented.
  
  
  RESULTS
  Of the 11 357 individuals eligible for the Dongguan Eye Study, 8952 (78.82%) subjects participated. All participants were self-identified Han Chinese. The average age was 54.0 years, 59.9% were female, 48.4% were farmers and 77.2% had elementary or junior middle school educational levels. The average body mass index and waist-hip ratio were 24.6 ± 3.9 kg/m(2) and 0.9 ± 0.2.
  
  
  CONCLUSIONS
  Data from the Dongguan Eye Study provide information concerning the prevalence, risk factors and impacts of eye diseases in rural residents undergoing urbanization in southern China.
authors.affiliation: Guangdong Eye Institute, Department of Ophthalmology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, China.
authors.forename: Qianli
authors.initials: Q
authors.lastname: Meng
authors.affiliation: Guangdong Eye Institute, Department of Ophthalmology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Cui
authors.affiliation: Department of Ophthalmology, Dongguan People's Hospital, Dongguan, Guangdong, China.
authors.forename: Min
authors.initials: M
authors.lastname: Zhang
authors.affiliation: Department of Ophthalmology, Hengli Hospital, Dongguan, Guangdong, China.
authors.forename: Lixin
authors.initials: L
authors.lastname: Zhang
authors.affiliation: Guangdong Eye Institute, Department of Ophthalmology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, China.
authors.forename: Liang
authors.initials: L
authors.lastname: Zhang
authors.affiliation: Department of Epidemiology and Health Statistics, School of Public Health, Sun Yat-sen University, Guangzhou, Guangdong, China.
authors.forename: Jinxin
authors.initials: J
authors.lastname: Zhang
authors.affiliation: Department of Endocrinology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, China.
authors.forename: Jian
authors.initials: J
authors.lastname: Kuang
authors.affiliation: Department of Ophthalmology, Dongguan People's Hospital, Dongguan, Guangdong, China.
authors.forename: Qingyang
authors.initials: Q
authors.lastname: Liu
authors.affiliation: The First Affiliated Hospital of Chongqing Medical University, Chongqing Eye Institute, Chongqing Key Laboratory of Ophthalmology, Chongqing, China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Zheng
authors.affiliation: Department of Ophthalmology, Hengli Hospital, Dongguan, Guangdong, China.
authors.forename: Zhongling
authors.initials: Z
authors.lastname: Luo
authors.affiliation: Department of Ophthalmology, Hengli Hospital, Dongguan, Guangdong, China.
authors.forename: Huikun
authors.initials: H
authors.lastname: Liu
authors.affiliation: Department of Ophthalmology, Hengli Hospital, Dongguan, Guangdong, China.
authors.forename: Guoping
authors.initials: G
authors.lastname: Zhu
authors.affiliation: Guangdong Eye Institute, Department of Ophthalmology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, China.
authors.forename: Jingjing
authors.initials: J
authors.lastname: Cai
authors.affiliation: Health Management Center, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, China.
authors.forename: Guanrong
authors.initials: G
authors.lastname: Zhang
authors.affiliation: Department of Epidemiology and Health Statistics, School of Public Health, Sun Yat-sen University, Guangzhou, Guangdong, China.
authors.forename: Xingxuan
authors.initials: X
authors.lastname: Wen
authors.affiliation: Guangdong Eye Institute, Department of Ophthalmology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, China.|Henan Aier Eye Hospital, Aier School of Ophthalmology, Central South University, Changsha, China.
authors.forename: Haike
authors.initials: H
authors.lastname: Guo
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D044466:Asian People / Q000208:ethnology*; D001766:Blindness / Q000208:ethnology*; D001824:Body Constitution; D002681:China / Q000453:epidemiology; D003430:Cross-Sectional Studies; D005128:Eye Diseases / Q000208:ethnology*; D005260:Female; D005951:Glucose Tolerance Test; D006304:Health Status; D006801:Humans; D007429:Intraocular Pressure / Q000502:physiology; D008055:Lipids / Q000097:blood; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D011788:Quality of Life; D012107:Research Design; D012307:Risk Factors; D012424:Rural Population / Q000706:statistics & numerical data*; D012923:Social Class; D014792:Visual Acuity / Q000502:physiology; D019987:Persons with Visual Disabilities / Q000706:statistics & numerical data*
chemical_list: D008055:Lipids
keywords: Dongguan Eye Study; baseline characteristic; eye disease; population-based cross-sectional study; visual impairment