Breast Cancer Rates Fell When Regular Hormone Therapy Decreased

Breast cancer rates dropped by half in tandem with the discontinuation of hormone replacement therapy, according to a study published online in the Journal of the National Cancer Institute. The study was reported in the Telegraph in the United Kingdom.

The Telegraph said:

“Dr Prithwish De, of the Canadian Cancer Society, and colleagues, found that use of HRT dropped from 12.7 per cent in 2002 to 4.9 per cent in 2004. During the same period breast cancer rates dropped by 9.6 per cent even though the same number of women were having mammography tests. Between 2004 and 2006 use of HRT remained stable at around five per cent of women aged 50 to 59 but breast cancer rates began to increase again.

Dr De wrote: ‘The results support the hypothesised link between the use of hormone replacement therapy and invasive breast cancer incidence and indicate that the sharp decline in breast cancer incidence in 2002 is likely explained by the concurrent decline in the use of hormone replacement therapy among Canadian women.’”

The study’s authors said these numbers support existing evidence of the link between HRT and breast cancer.

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