Outdoor work and the risk of pterygia: a case-control study
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Aim: To investigate the relationship between outdoor work and pterygium formation in a hospital-based case-control study in Singapore. Method: Sixty-one patients with pterygium (49 males, mean age 54.2 years) and 125 controls (41 males, mean age 50.2 years), excluding patients with cataract and age-related macular degeneration presenting at outpatient clinics of the Singapore National Eye Centre were interviewed face-to-face with a standard questionnaire. Demographic data and information on outdoor work and eye protection, were collected. Results: Thirty-eight subjects (20.4%) were outdoor workers and 148 (79.6%) were indoor workers. Outdoor workers were more likely to be male smokers and alcohol drinkers with lower family income and higher sunlight exposure than indoor workers. The crude odds ratio for pterygiumin outdoor workers was 7.0 (95% confidence interval 3.2, 15.3). The adjusted odds ratio was 4.2 (95% confidence interval 1.7, 10.1). Conclusion: There is a statistically significant association between outdoor work and pterygium formation, which may be related to the higher exposure to sunlight and dust in outdoor workers. Efforts may be made to educate outdoor workers to wear proper equipment to protect their eyes against excessive sunlight.
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- 1.Wong WW. A hypothesis on the pathogenesis of pterygium. Ann Ophthalmol 1978; 303–308.Google Scholar
- 4.Tan D, Lim ASM, Goh HS, Smith DR. The p53 tumour suppressor gene is abnormally expressed in conjuctivae of pterygium patients. Am J Ophthalmol 1997; 3: 404–405.Google Scholar
- 7.Taylor H, West S, Munoz B, Rosenthal F, Bressler S, Bressler N. The long term effects of visible light on the eye. Arch Ophthalmol 1992; 110L 99–104.Google Scholar
- 13.Rosenthal FS, Phoon C, Bakalian AE, Taylor HR. Ocular close of ultraviolet radiation to outdoor workers. Inv Op Vis Sci 1988; 29: 649–656.Google Scholar
- 15.Dimitry TJ. Dust factor in production of pterygium. Am J Ophthalmol 1937; 20: 40.Google Scholar
- 17.Mean and median monthly basic and gross wages of selected occupations for both sexes. In: 1997 Singapore Yearbook of Manpower Statistics, pp. 21–39.Google Scholar