American Journal of Epidemiology Vol. 135, No. 7: 749-762
Copyright © 1992 by The Johns Hopkins University School of Hygiene and Public Health
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The Association of Cutaneous Malignant Melanoma and Fluorescent Light Exposure
1Department of Clinical Epidemiology and Biostatistics McMaster University Hamilton Ontario Canada
2Ontario Cancer Treatment and Research Foundatjon Epidemiology Research Unit Department of Preventive Medicine and Biostatistics University of Toronto Toronto Ontario Canada
3Department of Pathology Women's College Hospital; Departments of Medicine and Pathology University of Toronto; Ontario Cancer Treatment and Research Foundation Toronto-Bayvtew Regional Cancer Centre Toronto Ontario Canada
4Division of Occupation and Environmental Health University of British Columbia Vancouver British Columbia Canada
Reprint requests to Dr. Stephen D Walter, Department of Clinical Epidemiology and Biotatisitics, McMaster University Health Sciences Centre, Hamilton, Ontario, Canada L8N3Z5.
Data are presented from an interview case-control study (583 cases and 608 controls), performed in southern Ontario, Canada, from October 1984 to September 1986, on the association of cutaneous malignant melanoma with exposure to fluorescent light. Males showed a significant trend with cumulative years of occupational exposure and with various indices of exposure to domestic fluorescent light. The risk was more pronounced for lesions on the arms and for superficial spreading melanomas. There was no consistent association in females. These effects were similar when adjusted for other major risk factors for melanoma, including the amount of time spent outdoors occupationally. Comparisons of melanoma cases interviewed before or after diagnosis revealed no evidence of rumination bias. Comparisons of sample data from the same cases and controls by interview and mail questionnaire showed reasonable levels of reliability with no evidence of recall bias. A small sample of subjects was also selected for exposure validation with employers; this revealed very accurate recall of occupational exposure. On the basis of these results, previous epkJemiologic studies, and clinical and animal evidence, the authors conclude that fluorescent light exposure remains a potential risk factor for melanoma. Am J Epidemiol 1992; 135:749–62.
lighting; melanoma; ultraviolet rays
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