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Epidemiology of breast cancer and hair dyes

Journal of the National Cancer Institute 71(3): 481-488
Epidemiology of breast cancer and hair dyes
In a case-control study of 401 breast cancer cases and 625 age-matched controls, the possible etiologic role of hair dye usage was investigated. No association was found between hair dye use and breast cancer (odds ratio = 1.02; 95% confidence interval = 0.77-1.32) or any factors affecting dosage, frequency, duration, type or color of hair dye. Important confounders of hair dye use included religion and smoking status. When stratified by 10 yr age groups, there was no appreciable trend in risk status between case and referent populations. No dose-response relationship (frequency .times. duration .times. shade .times. type of dye used) was found, even after controlling for factors affecting hair dye use. A multiple logistic regression analysis supported the absence of this relationship.

Accession: 005375939

PMID: 6577224

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