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Re: US Breast Cancer Rates FallFrom: art fougner, md (evsono@pipeline.com)Fri Dec 15 07:19:27 2006
Here's more ... Decline in Breast Cancer Diagnoses Follows Decline in Hormone Therapy Use, Recent Data Confirms Latest Data From Kaiser Permanente and California Cancer Registry Shows Drop
OAKLAND, Calif., Dec. 6 /PRNewswire/ -- Research scientists at the
Northern California Cancer Center and Kaiser Permanente's Division of
Research have found significant reductions in both the use of hormone
replacement therapies and the incidence of breast cancer in California
in the years following the release of the 2002 Women's Health Initiative
(WHI)trial results. The data appear in the November 20 issue of the
Journal of
Clinical Oncology.
Previous studies have shown that long-term use of hormone therapy is
linked to increased risk of breast cancer. For example, the WHI
randomized trial and other studies discovered that estrogen plus
progestin hormone
therapy use increased a woman's risk of breast cancer.
This new analysis, the first to use the most recent 2004 California
Cancer Registry data, supports the theory that women who discontinue
hormone therapy use may reduce their chances of being diagnosed with
breast cancer.
"Hormone therapy use dropped 68 percent between 2001 and 2003, and
shortly thereafter we saw breast cancer rates drop by 10 to 11 percent.
This drop was sustained in 2004, which tells us that the decline wasn't
just a fluke," notes Dr. Christina A. Clarke, the Northern California
Cancer Center scientist who led the study.
In the current study, researchers examined yearly prevalence of hormone
therapy use and breast cancer incidence from 1994 to 2003 for women ages
50
to 74 in Kaiser Permanente's Northern California Region and in the 2004
California Cancer Registry. They found consistent evidence of
corresponding trends in decline in both hormone therapy use and breast
cancer incidence.
"We can't say that changes in hormone therapy use caused the decline in
breast cancer, because these data don't link hormone users directly to
breast cancer diagnoses, but they are certainly suggestive," adds Dr.
Lisa Herrinton from Kaiser Permanente's Division of Research. "If it
holds up
over time, a 10 percent decline in breast cancer incidence is really
striking. It amounts to an annual reduction of about 10,000 breast
cancer cases in women aged 50 to 74."
Similar studies on the decline of breast cancer incidence in the United
States will be presented by different researchers at the San Antonio
Breast Cancer Symposium next week, though only data from 2003 is
presented. The Northern California Cancer Center/Kaiser Permanente
study includes data through 2004, and it provides information on hormone
therapy for the same population.
>From their analysis, researchers maintain that breast cancer incidence SOURCE Kaiser Permanente Art
At Fri, 15 Dec 2006, R. Daniel Braun wrote:
>
>>>> ----- Original Message -----
-- art fougner, md "May The Wings of Liberty Never Lose a Feather." - Jack Burton
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