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Prevalence and associated factors of diabetic retinopathy in Beijing, China: a cross-sectional study
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  • Published on:
    Prevalence of diabetic retinopathy in China
    • Andrzej Grzybowski, MD, PhD, MBA 1Department of Ophthalmology, Poznan City Hospital, Poznan, Poland 2Department of Ophthalmology, University of Warmia and Mazury
    • Other Contributors:
      • Piotr Kanclerz, MD, PhD

    We have read the article by Cui et al.[1] with interest, however we believe that some issues should be clarified. The authors present a cross-sectional study aimed to determine the risk factors for diabetic retinopathy (DR) in the Chinese population.

    On a cohort of 17 985 individuals from Beijing, China, the prevalence of DR was 1.5% in the general study population and 8.1% among individuals with diabetes mellitus (DM). It is presented that since the Beijing population is composed of Han people as well as minorities from the country, it could be considered as representative of the Chinese population. It should be underlined that the assessed prevalence is far lower than that of other studies, including those from Asian countries. For example the prevalence of DR among primary care Chinese patients with DM in Hong Kong was 39.0% [2], and 37% among Chinese patients aged over 40 years with a self-reported diagnosis of diabetes in the Beijing Eye Study [3].

    Thus, questions about the methodology can be raised. The American Diabetes Association clearly states the criteria for the diagnosis of diabetes: 1) fasting plasma glucose ≥ 126 mg/dL (≥ 7.0 mmol/L) 2) 2-hour plasma glucose after a 75-g oral glucose tolerance test ≥ 200 mg/dL (≥ 11.1 mmol/L) 3) A1C ≥ 6.5% 4) In a patient with classic symptoms of hyperglycemia or hyperglycemic crisis, a random plasma glucose ≥200 mg/dL (11.1 mmol/L) [4]. Thus, it should be clarified if the diagnosis of diabetes in this study w...

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    Conflict of Interest:
    None declared.