An Effect Of Hormone Therapy On Breast Cancer.
Although several huge studies in just out years have linked the use of hormone therapy after menopause with an increased chance of breast cancer, the authors of a new analysis claim the evidence is too limited to confirm the connection. Dr Samuel Shapiro, of the University of Cape Town Medical School in South Africa, and his colleagues took another aspect at three weighty studies that investigated hormone therapy and its viable health risks - the Collaborative Reanalysis, the Women's Health Initiative (WHI) and the Million Women Study memory. Together, the results of these studies found overall an increased imperil of breast cancer in the midst women who used the combination form of hormone therapy with both estrogen and progesterone.
Women who have had a hysterectomy and use estrogen-only remedy also have an increased risk, two of the studies found. The WHI, however, found that estrogen-only analysis may not increase breast cancer risk and may actually decrease it, although that has not been confirmed in other research found it for you. After the WHI weigh was published in July 2002, women dropped hormone psychoanalysis in droves.
Many experts pointed to that decline in hormone therapy use as the reason breast cancer rates were declining. Not so, Shapiro said: "The run out of steam in breast cancer degree started three years before the fall in HRT use commenced, lasted for only one year after the HRT cast off commenced, and then stopped". For instance between 2002 and 2003, when large numbers of women were still using hormone therapy, the party of new breast cancer cases fell by nearly 7 percent.
In taking a appearance at the three studies again, Shapiro and his team reviewed whether the evidence satisfied criteria notable to researchers, such as the strength of an association, taking into account other factors that could influence risk. Their conclusion: The demonstrate is not strong enough to say definitively that hormone therapy causes breast cancer. The studio is published in the current issue of the Journal of Family Planning and Reproductive Health Care.
