Early studies treated secondhand smokers as if they were nonsmokers, which actually masked the evidence; later studies separated out the two, and found that both active and passive smoking are causes of breast cancer.
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Recent studies may explain inconsistencies between previous results, say researchers, and a real risk may be emerging.
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PubMed is the National Library of Medicine's search service that provides access to over 11 million citations in MEDLINE, PreMEDLINE, and other related databases, with links to participating online journals.
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Report on 1996 study: 'the relative risk for breast cancer from passive smoke (primarily girls whose parent smoked or women whose spouse smoked) was 3.2! This makes passive smoking a more important risk factor than having a mother with breast cancer (2.1), or having an early first period (1.3), or having a late first pregnancy (1.4).'
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Cigar & Cigarette Resources Updated On:
11-Feb-2009
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13:35:18
