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The CancerWeb Report, What's New In Cancer
Colorectal Cancer: November 1995
Last modified on:
Tuesday, April 20, 1999 12:03:10
Copyright © 1994-2008, Information Ventures, Inc.
Smoking and Colorectal Cancer -
Large bowel cancer has not generally been considered to be linked
to smoking, but evidence has been accumulating for this in men,
and now in women also. Dr. Polly Newcomb and colleagues at the
University of Wisconsin Cancer Center in Madison, provide a
second definitive study of cancers of the colon and rectum in
women. After allowing for a range of factors that could
interfere with the conclusions, they showed that the risks of
both cancers were significantly raised for women who had ever
smoked, with odds ratios of 1.28 for colon cancer and 1.44 for
rectal tumors. Risk increased with greater numbers of cigarettes
smoked daily, longer duration of smoking, and starting earlier.
However, the risk remained higher even in those who had quit.
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