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Less HT use might mean lower mammogram rates

Saturday August 27, 2011
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A new analysis has found that a decline in hormone therapy use among women ages 50 to 64 is linked with lower mammogram rates among these women.

Published early online in Cancer, a peer-reviewed journal of the American Cancer Society, the study suggests that when women stop seeing their doctor for HT prescriptions, physicians do not have the opportunity to remind them that their mammograms are due.

Since rates were first measured in 1987, more women got a mammogram each year than in the year before until 2005. A widely publicized report that linked HT use with breast cancer led to a dramatic decline in the use of HT between 2000 and 2005.

Because current users of HT also tend to have higher mammography rates, Nancy Breen, PhD, and colleagues with the National Cancer Institute in Rockville, Md., speculated that women who stopped taking HT might also have stopped getting mammograms. The reasoning was that if women typically need to see a doctor to renew their HT prescription and physicians typically take that opportunity to discuss and order mammograms, then stopping the HT prescription visits would result in a lost opportunity for doctors to remind women about mammograms.

To test their hypothesis, the researchers analyzed the leading national source of health data for the U.S. population, the National Health Interview Survey, which is also the largest population-based national sample on mammography use. The study examined 7,125 women who were interviewed in 2000 and 7,387 women who were interviewed in 2005, all of whom were age 50 or older.

The investigators found that the dramatic drop in use of HT helps explain the slight drop in mammography observed between 2000 and 2005 for women ages 50 to 64 years but not for women ages 65 and older. Other factors that were associated with whether a woman got a mammogram included her education level, the type of health insurance coverage she had and how recently she had last visited her doctor.

"Our research corroborates that a doctor's recommendation is an important step in getting a mammogram and it shows that when circumstances changes such as evidence about HT — it can upset the balance and lead to unanticipated and undesirable changes in mammography use," Breen said.

"In short, we need to continue to ensure that women know about mammography and where they can get it. Mammography also needs to be affordable and convenient for women."

Breen added that mammography is the best way to detect breast cancer early, when treatment is most effective.

To view the study data, visit http://onlinelibrary.wiley.com/doi/10.1002/cncr.26218/abstract.


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