A recent decline in breast cancer incidence is unlikely to be caused by a decrease in mammography screening, according to a study published in the Journal of the National Cancer Institute. It is more likely due to the drop in postmenopausal hormone use. There has been a recent, rapid decline in postmenopausal hormone therapy use since 2002 when the Women s Health Initiative study found that hormone therapy was associated with an increased risk of breast cancer. Recent data has linked a decrease in breast cancer incidence over the last few years to this drop in hormone use, but this explanation remains controversial. Some researchers have said it is unclear whether the drop was related to the decline in hormone therapy use or a decrease i…