Prevalence survey on peterygium among people aged 40 or above in Luzhou city of Sichuan province in 2011

Objective To investigate the prevalence of pterygium among people aged 40 or above in Luzhou City of Sichuan province and evaluate the relationship with environment,age,sex and so on.Methods Using a multistage stratified random sampling method,a total number of 7478 individuals of 6 communities aged 40 or above were selected and then the diagnosis,classification and prevalence of pterygium were analyzed.Results Of the 7478 individuals,401 (5.36％) had pterygium.There was a significantly higher prevalence in men (5.99％) than in women (4.91％,x2=4.133,P =0.042).It was increased with age.Conclusions There is a close correlation between pterygium prevalence of Luzhou City and Luzhou geographic environment.The prevalence of pterygium is higher in men than in women.Increased opportunities to exposure to hazardous stimuli of men as the main family labor in Luzhou area than women may be related. Key words: Pterygium;  Epidemiology;  Prevalence