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- W2380821587 abstract "Objective To investigate the prevalence of pterygia in aged 55 years and over in rural Beijing aged population and identify the relationship between age, gender, environment and pterygia. Design Population-based cross-sectional study. Participants 22 008 individuals with external ocular photos aged 55-85 from 10 suburban areas, 142 villages in Beijing cataract screening in 2008. Methods All subjects were invited to complete a medical record and taken external ocular and fundus photos, and then were uploaded to internet and made pterygium diagnosis with stages and grades by ophthalmic specialists. Main Outcome Measures Prevalence, stages and grades of pterygia. Results Of the 22008 individuals, 911 (4.14%) had pterygia. The average prevalence (5.52%) in Daxing and Fangshan districts with low latitude and low precipitation was significantly higher in Miyun and Huairou districts (3.06%) with high latitude and deep precipitation (P=0.000). The prevalence in male (5.60%) was significantly higher in female (3.48%) (P=0.000). The majority of pterygia (43.3%) were in active state and 44.3% pterygia involved pupil area corneas. Conclusion The pterygia prevalences of subjects aged 55 years and over in Beijing rural areas are different. Regions with different latitude and precipitation and gender appear to be the important risk factors. The majority of pterygia were in active state and Grade IV." @default.
- W2380821587 created "2016-06-24" @default.
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- W2380821587 date "2009-01-01" @default.
- W2380821587 modified "2023-09-28" @default.
- W2380821587 title "Prevalence of pterygium in rural Beijing aged population" @default.
- W2380821587 hasPublicationYear "2009" @default.
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