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Y. Li, J. Shi, L. Xu; The Prevalence and Severity of Diabetic Retinopathy in Patients With Type 2 Diabetes in China. Invest. Ophthalmol. Vis. Sci. 2009;50(13):4433.
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© ARVO (1962-2015); The Authors (2016-present)
To estimate the prevalence of diabetic retinopathy (DR) in patients with type 2 diabetes in China using retinal fundus photography.
Consecutive 2019 patients with type 2 diabetes from diabetes department of Tongren hospital were enrolled in this survey. The sample included 957 men and 1062 women, aged 56.3±11.2 yrs. All patients received six-field digital colour mydriatic photography similar to ETDRS standard. Diabetic retinopathy was defined by the presence of at least one microaneurysm at least in one eye. Diagnosis and grading were made based on the international clinical diabetic retinopathy and diabetic macular edema disease severity scales by a retinal specialist.
Diabetic retinopathy was detected in 805/2019 (39.9%) subjects. Among them, mild nonproliferative diabetic retinopathy (NPDR) was present in 342 (16.94%), moderate NPDR in 324 (16.15%), severe NPDR in 26 (1.29%), and proliferative diabetic retinopathy (PDR) in 113 (5.6%). The preavalence and the severity of DR showed no difference between male and female samples (P = 0.904). The stage of diabetic retinopathy was associated with known duration of diabetes (P = 0.001). Some retinopathy did not progressed synchronously in both eyes. For the patients with severe NPDR, 26.9% showed moderate NPDR, and 7.7% mild NPDR in the other eye; for those with PDR, 15.9% showed moderate or mild NPDR in the other eye. Among all the patients, 82.71% have no knowledge of regular detection for DR, while 80.36% of those with PDR received no fundus examination in recent 3 years.
The prevalence of DR was high in the diognosed type 2 diabetes patients in China. Most of them were poorly educated about DR.
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