Original articlePrevalence of Diabetic Retinopathy in Rural China: The Handan Eye Study
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Study Design and Population
The Handan Eye Study is a population-based study designed to determine the prevalence of blindness, visual impairment, and common eye diseases in a rural population in northern China. Details of the study design, sampling plan, and baseline data are reported elsewhere.28 In brief, 7557 eligible people of Yongnian County, Handan, Hebei Province, aged 30 years and older, were identified from 13 randomly selected villages using a stratified, clustered, and multistaged sampling technique with
Results
Of the 6830 eligible participants, 5597 (81.9%) completed the FPG examination. Among the subjects with FPG results, 5460 (79.9%) had gradable fundus images. Those without glucose results or gradable photographs were older, were more often male, had less hypertension, and had lower systolic blood pressure, diastolic blood pressure, and body mass index (Table 1).
A total of 140 subjects reported that they had been diagnosed previously with DM (KDM), including 5 with no treatment, 7 treated with
Discussion
The current study provides data on the prevalence and characteristics of DR in a Chinese rural population aged 30 years or more in northern mainland China. The age-standardized prevalence of DR was 43.1%, the age-standardized prevalence of CSME was 3.5%, and the age-standardized prevalence of vision-threatening DR was 6.3% among participants with diabetes. More than 90% of those with vision-threatening retinopathy (requiring laser treatment) had not been treated. On the basis of estimates
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Manuscript no. 2008-729.
Financial Disclosure(s): The author(s) have no proprietary or commercial interest in any materials discussed in this article.
Supported by the National Basic Research Program of China (973 Program) (No. 2007CB512201) from the Ministry of Science and Technology of the P.R. China, and the Program of Health Policy for blindness prevention from P.R. China. Partially founded by the Key Technologies R&D Program (No. 2006–10903) from the Bureau of Science and Technology of Handan City, P.R. China. With additional support from Beijing Tongren Hospital and key discipline fund of Bureau of Health, Handan City, P.R. China.