By Age Group
Cancer deaths data are derived from the Ontario Cancer Registry (OCR) operated by Cancer Care Ontario. The OCR contains information on Ontario residents who have died of all types of malignant cancers. Cancer sites were coded using the Third Edition of the International Classification of Diseases for Oncology (ICDO-3).
In 2012, 75 Simcoe Muskoka females died from breast cancer with an age-standardized mortality rate for females of all ages of 23.5 (13.4, 22.1) per 100,000 population. This was not significantly different from the Ontario female breast cancer mortality rate of 25.7 (24.6, 26.9) per 100,000. Breast cancer is the second leading cause of cancer deaths among females in both Simcoe Muskoka and Ontario after lung cancer.
Figure one below shows the trend in breast cancer mortality in both Simcoe Muskoka and Ontario over the 27 year period from 1986 to 2012. The female breast cancer mortality rates both in Simcoe Muskoka and Ontario have decreased significantly over this time period, with an average annual decline of approximately 2% per year.
By Age Group
Female breast cancer mortality increases significantly with age (see figure two). The age-specific breast cancer mortality rates between 2007 and 2012 (combined) in Simcoe Muskoka were highest among older seniors 75 years of age and older at 158 (136.7, 181.4) deaths per 100,000, compared with only six (3.9, 8.4) deaths per 100,000 women 20 to 44 years of age. The age-specific female breast cancer mortality rates in Simcoe Muskoka were not significantly different from the comparable provincial rates for all age groups among adults 20 years of age and older.