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Environmental Toxins and Breast Cancer on Long Island. II. Organochlorine Compound Levels in Blood
Ist Teil von
Cancer epidemiology, biomarkers & prevention, 2002-08, Vol.11 (8), p.686-697
Ort / Verlag
Philadelphia, PA: American Association for Cancer Research
Erscheinungsjahr
2002
Link zum Volltext
Quelle
MEDLINE
Beschreibungen/Notizen
Whether environmental contaminants increase breast cancerrisk among women on Long Island, NY, is unknown. The study objective
is to determine whether breast cancer risk is increased in relation to organochlorines, compounds with known estrogenic characteristics
that were extensively used on Long Island and other areas of the United States. Recent reports do not support a strong association,
although there are concerns with high risks observed in subgroups of women. Blood samples from 646 case and 429 control women
from a population-based case-control study conducted on Long Island were analyzed. No substantial elevation in breast cancer
risk was observed in relation to the highest quintile of lipid-adjusted serum levels of p,p ′-bis(4-chlorophenyl)-1,1-dichloroethene (DDE) [odds ratio (OR), 1.20 versus lowest quintile; 95% confidence interval (CI), 0.76–1.90], chlordane (OR, 0.98; 95% CI, 0.62–1.55), dieldrin (OR, 1.37; 95%
CI, 0.69–2.72), the sum of the four most frequently occurring PCB congeners (nos. 118, 153, 138, and 180; OR, 0.83; 95% CI,
0.54–1.29), and other PCB congener groupings. No dose-response relations were apparent. Nor was risk increased in relation
to organochlorines among women who had not breastfed or were overweight, postmenopausal, or long-term residents of Long Island;
or with whether the case was diagnosed with invasive rather than in situ disease, or with a hormone receptor-positive tumor. These findings, based on the largest number of samples analyzed to date
among primarily white women, do not support the hypothesis that organochlorines increase breast cancer risk among Long Island
women.