北京农村老年居民翼状胬肉患病情况分析

目的调查北京远郊区县55岁以上农村居民翼状胬肉患病情况，明确翼状胬肉的患病与年龄、性别及环境的关系。设计人群为基础的横断面研究。研究对象2008年北京10个远郊区县、142个乡镇白内障筛查时有外眼像的22008位农民（年龄55．85岁）。方法采用眼底照相机进行外眼及眼底照相，将病史及影像资料传至互联网数据库上，由眼科专家集中根据影像做出翼状胬肉诊断及分期、分级。主要指标翼状胬肉患病情况、分期及分级。结果22008位农民中翼状胬肉患者911例（4．14％）。低纬度、少降水量的大兴及房山两区翼状胬肉平均患病率5．52％，与相对高纬度多降水的密云、怀柔患病率3．06％相比，差异有统计学意义（x2=32．091，P=0．000）。男性翼状胬肉患病率（5．60％）明显高于女性（3．48％）（χ^2=53．996，P=0．000）。随着年龄的增加，翼状胬肉患病率有升高趋势，但差异无统计学意义（χ^23．848，P=0．146）。进行期翼状胬肉占患者总数的43．3％。侵入瞳孔区的IV级翼状胬肉占患者总数的44．3％。结论北京远郊区县55岁以上农村居民不同地域、不同性别间翼状胬肉患病率存在差异。进行期翼状胬肉及侵入瞳孔区的Ⅳ级翼状胬肉患者最多。（眼科，2009,18：114—117）

Prevalence of pterygium in rural Beijing aged population

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 Bcijing 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 signifieantly 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 prevalenees 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. （Ophthalmol CHN, 2009,18：114-117）