title: Prevalence and risk factors for pterygium in rural older adults in Shandong Province of China: a cross-sectional study.
abstract: To investigate the prevalence and risk factors for pterygium in rural older adults in Shandong Province, eastern China, a population-based, cross-sectional study was performed from April to July 2008. By means of cluster random sampling methods, a total of 19,583 people aged 50 years or above were randomly selected from four rural counties. Out of 19,583 people, 1,767 residents were excluded mainly because they were migrant workers when this study was performed. Finally, 17,816 (90.98%) people were included as eligible subjects. They received a comprehensive eye examination and a structured questionnaire voluntarily. Patients with pterygium were defined as having pterygium at the time of survey or pterygium surgery had been performed. 1,876 people were diagnosed as pterygium, either unilateral (1,083) or bilateral (793), which is equivalent to a prevalence of 10.53% (95% CI, 10.08-10.98). The multivariate logistic regression analysis showed that pterygium was independently associated with older age, areas, outdoor time, educational level, and use of hat and/or sunglasses. The prevalence of pterygium increased with age and hours spent under sunshine per day. Meanwhile, the higher the educational level and the more use of hat and/or sunglasses, the lower the pterygium prevalence.
authors.affiliation: Department of Ophthalmology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, China.
authors.forename: Wanzhen
authors.initials: W
authors.lastname: Jiao
authors.affiliation: Institute of Social Medicine and Health Service Management, School of Public Health, Shandong University, Jinan 250012, China.
authors.forename: Chengchao
authors.initials: C
authors.lastname: Zhou
authors.affiliation: Shandong Eye Hospital, Shandong Eye Institute, Shandong Academy of Medical Sciences, Jinan 250021, China.
authors.forename: Ting
authors.initials: T
authors.lastname: Wang
authors.affiliation: Department of Ophthalmology, Qianfoshan Hospital Affiliated to Shandong University, Jinan 250014, China.
authors.forename: Shaoyuan
authors.initials: S
authors.lastname: Yang
authors.affiliation: Eye Hospital, Shandong University of Traditional Chinese Medicine, Jinan 250355, China.
authors.forename: Hongsheng
authors.initials: H
authors.lastname: Bi
authors.affiliation: Department of Ophthalmology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, China.
authors.forename: Liping
authors.initials: L
authors.lastname: Liu
authors.affiliation: Department of Ophthalmology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Li
authors.affiliation: Department of Ophthalmology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, China.
authors.forename: Lihua
authors.initials: L
authors.lastname: Wang
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D044466:Asian People; D002681:China; D005139:Eyeglasses; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D011625:Pterygium / Q000473:pathology / Q000601:surgery*; D012307:Risk Factors; D012424:Rural Population