By Age Group
Cancer incidence data are derived from the Ontario Cancer Registry (OCR) operated by Cancer Care Ontario. The OCR contains information on Ontario residents who have been newly diagnosed with all types of malignant cancers, with the exception of basal cell and squamous cell (non-melanoma) skin cancers. Beginning in 2014, the OCR adopted the National Cancer Institute (NCI) SEER standards for counting multiple primaries for cancer cases diagnosed in 2010 and beyond. This standard is more liberal than the previously used case counting rules from the modified version of the International Association of Cancer Registries (IACR). Cancer data presented on this and other HealthSTATS pages only includes cases captured using the more conservative IACR definition for all years in order to maintain comparability over time. As a result, figures presented on HealthSTATS may be lower than those reported by Cancer Care Ontario as they are using the revised counting methodology.
The rate of new cancer cases (also called the incidence rate) provides a measure of the risk of developing cancer over a given period of time. In 2012 among Simcoe Muskoka residents, there were nearly 400 new cases of colorectal cancer diagnosed with an age-standardized incidence rate for all ages and both sexes of 68 (61.5, 56.0) per 100,000 population. This was not significantly different from the Ontario colorectal cancer incidence rate of 63 (61.6, 64.2) per 100,000.
Figure one below shows the trend in colorectal cancer incidence in both Simcoe Muskoka and Ontario over the twenty-seven year period from 1986 to 2012. The colorectal cancer incidence rates both in Simcoe Muskoka and Ontario decreased at a small but significant pace over this time period, with an annual percentage decrease of less than a half a per cent per year. The Simcoe Muskoka rates were above the Ontario rates for the majority of this twenty-seven year time-period. Figure One
In 2012, the age-standardized incidence rate for colorectal cancer among Simcoe Muskoka males was 87 (75.8, 98.9) per 100,000, which was significantly higher than the female rate of 52.5 (44.8, 61.3) per 100,000. The 2012 age-standardized colorectal cancer incidence rates for Ontario males and females were not significantly different from the comparable Simcoe Muskoka rates.
Figure two shows the trend in colorectal cancer incidence rates for males and females in Simcoe Muskoka over the 27 year period between 1986 and 2012. The colorectal cancer incidence rates for males and females in Simcoe Muskoka have remained relatively flat over the past two decades, with the male rates being above the female rates for the entire time period. Figure Two
By Age Group
The risk of being diagnosed with colorectal cancer increases significantly with age (see figure three). The age-specific colorectal cancer incidence rates between 2007 and 2012 (combined) in Simcoe Muskoka were highest among those 75 years and older at 395 (368.5, 422.1) new cases per 100,000 population. The age-specific colorectal cancer incidence rates in Simcoe Muskoka were significantly higher than the comparable provincial rates for seniors 65 to 74 years of age. Figure Three