Wednesday, December 12, 2007

Study Finds the Pill Increases Risk of Breast Cancer

Separating sex from procreation apparently comes at an even greater cost than we previously imagined

UPDATE 4/5/12: Birth control shots tied to breast cancer risk, study says

From "Why isn't this study on the pill heeded?" by Dennis Byrne, posted 12/3/07 at Chicagotribune.com

Not wanting to become known as the town quack, I am reluctant to write another politically incorrect column about breast cancer.

Four weeks ago, when I reported a study that found a statistical link between abortion and breast cancer, the hate e-mail poured in, denouncing me for being an ignorant, stupid, anti-science, anti-choice and anti-woman lunatic. But it also brought a message alerting me to yet another study, suggesting that premenopausal women (younger than 50) who used oral contraceptives prior to having their first child faced a higher risk of breast cancer. Yes, I know, this debate has been going on for years, if not decades, and judging by the last studies given wide exposure a few years ago by the media, the issue seems settled: Oral contraception does not significantly increase the risk of breast cancer.

There's just one problem. According to an analysis in one of the most credible peer-reviewed journals in the country, the Mayo Clinic Proceedings, the risk is real. The study employed an often-used medical research technique called "meta-analysis" that allows researchers to combine data from other studies on the risk to get a larger picture. The result: Premenopausal women who used oral contraceptives prior to having their first child have a 44 percent higher chance of getting cancer than women who didn't use the pill. If they used the pill for more than four years prior to their first full-term pregnancy, the risk increased 52 percent. Chris Kahlenborn, an internist at the Altoona (Pa.) Hospital and the study's lead author, suggests one additional woman in 200 could get breast cancer. Extrapolated throughout the population, that could mean thousands more cases every year. I'd say that's an important story.

The reaction? Nearly total silence. Since it was published more than a year ago, I couldn't find a single reference to it in the archives of the New York Times, Washington Post, Los Angeles Times or this paper. The Associated Press appears not to have covered it. I couldn't find a single mainstream media article about it in a Google search. But stories about other breast cancer risks were plentiful, including one about how sleeping with a night light on can increase your chances of getting breast cancer. The National Institute of Cancer doesn't mention the study on its Web site, but it did detail a 5-year-old study claiming to find no higher risk to pill use. The American Cancer Society also doesn't mention the study and concedes only that "it is still not clear what part" the pill plays in breast cancer. Such guidance, if not deceptive, is certainly incomplete.

The link between abortion and breast cancer and dementia and vasectomies makes one wonder if Catholics have had it right all along...

Read the entire commentary.