Original articleThe 10-Year Incidence and Risk Factors of Retinal Vein Occlusion: The Beijing Eye Study
Section snippets
Baseline Characteristics of the Beijing Eye Study
The Beijing Eye Study is a population-based prospective cohort study in Greater Beijing that started in 2001 at baseline. The Medical Ethics Committee of Beijing Tongren Hospital approved the study protocol. The study was divided into an urban part and a rural part. The urban part was selected from the Haidian urban district, which was a typical urban region in the northern part of central Beijing. The rural part was selected from the rural village area of Yufa in the county of Daxing District,
Baseline Data
In 2011, of all 4439 participants who participated in the baseline examination, 2695 (1139 men [42.3%]) were reexamined, whereas 379 participants were dead and 1365 subjects did not agree to be reexamined or had moved away. The response rate was 60.7% of the original cohort, or 66.4% of the survivors. Study participants were significantly (P<0.001) younger than nonparticipants and lived more often in the rural region. Both groups did not differ in refractive error (P = 0.23) and gender (P =
Discussion
In the 10-year follow-up of our study population from 2001, the incidence of RVOs was 1.9±0.1 per 100 persons and 1.0±0.1 per 100 eyes, with an incidence of 1.6±0.1 per 100 subjects for BRVOs and 0.3±0.1 per 100 persons for CRVOs. Of 61 patients with an RVO in 2001 and with 38 of these subjects reexamined in 2006 and 25 subjects reexamined in 2011, at least 4 (7%) developed a second RVO during the 10-year follow-up period. Macular edema was detected in 18 (37%) of all RVO eyes, including 13
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Manuscript no. 2012-358.
Financial Disclosure(s): The author(s) have no proprietary or commercial interest in any materials discussed in this article.
Supported by the National Natural Science Foundation of China.