Five-Year Incidence and Predictors for Pterygium in a Rural Community in China: The Yunnan Minority Eye Study.


PURPOSE To determine the 5-year cumulative incidence of pterygium and its associated predictors in the Bai Chinese population in a rural community. METHODS This population-based study included 2133 subjects aged 50 years or older in 2010 and was repeated in 2015 with 1520 subjects (71.3%) participating in the follow-up examination. Participants with pterygium in either eye in 2010 were excluded from the analysis related to incidence. Anterior segment examination was performed without pupil dilation using a slit lamp, and pterygium was defined as a raised fleshy triangular fibrovascular tissue growth of the conjunctiva encroaching onto the clear cornea. RESULTS The 5-year cumulative incidence of pterygium was 6.8% [95% confidence interval (CI), 5.2-8.4] and was significantly higher in women compared with men (8.8% vs. 3.8%; P = 0.003). The age-specific incidence was 7.7%, 6.5%, and 5.6% in those aged 50-59, 60-69, 70 years, or older at the baseline, respectively. Outdoor occupation was the only predictor, which remained to be significantly associated with a higher incidence of pterygium in multivariate analysis (odds ratio = 2.52, 95% CI, 1.27-4.95). The predictive effect of outdoor occupation on incident pterygium was moderate with an area under the curve in the receiver operating characteristic analysis of 0.59 (95% CI, 0.53-0.66). CONCLUSIONS The incidence of pterygium in this rural cohort was higher compared to a previous report in Chinese in urban areas. The findings are important for health policy makers to project future burden of pterygium and make proper decisions on health resource allocation.

DOI: 10.1097/ICO.0000000000000637

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@article{Li2015FiveYearIA, title={Five-Year Incidence and Predictors for Pterygium in a Rural Community in China: The Yunnan Minority Eye Study.}, author={Lan Li and Hua Zhong and Ermiao Tian and Min Bin Yu and Yuansheng Yuan and Wenyan Yang and Tao Wei and Xueping Cha and Xun Li and Juanjuan Li and Xiaodan Su and Chen-Wei Pan}, journal={Cornea}, year={2015}, volume={34 12}, pages={1564-8} }