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Bowel cancer incorporates ICD-10 cancer codes C18 (Malignant neoplasm of colon), C19 (Malignant neoplasm of rectosigmoid junction) and C20 (Malignant neoplasm of the rectum).
In 2012, there were 14,958 new cases of bowel cancer diagnosed in Australia (8,239 males and 6,718 females).a In 2016, it is estimated that 17,520 new cases of bowel cancer will be diagnosed in Australia (9,815 males and 7,705 females).b
In 2012, the age-standardised incidence rate was 59 cases per 100,000 persons (70 for males and 50 for females).d In 2016, it is estimated that the age-standardised incidence rate will be 62 cases per 100,000 persons (74 for males and 51 for females).
Bowel cancer was the 3rd most commonly diagnosed cancer in Australia in 2012. It is estimated that it will become the 2nd most commonly diagnosed cancer in 2016.
In 2016, it is estimated that the risk of an individual being diagnosed with bowel cancer by their 85th birthday will be 1 in 12 (1 in 10 males and 1 in 15 females).
In 2016, the incidence rate of bowel cancer is expected to generally increase with age (see figure below).
Source: AIHW analysis of the Australian Cancer Database, (see source table 1).
In 2013, there were 4,162 deaths from bowel cancer in Australia (2,299 males and 1,863 females). In 2016, it is estimated that this will decrease to 4,094 deaths (2,144 males and 1,950 females).c
In 2013, the age-standardised mortality rate was 16 deaths per 100,000 persons (19 for males and 13 for females).d In 2016, it is estimated that the age-standardised mortality rate will be 14 deaths per 100,000 persons (16 for males and 12 for females).
In 2013, bowel cancer accounted for the 2nd highest number of deaths from cancer in Australia. It is estimated that it will remain the 2nd most common cause of death from cancer in 2016.
In 2016, it is estimated that the risk of an individual dying from bowel cancer by their 85th birthday will be 1 in 52 (1 in 45 for males and 1 in 62 for females).
The number of new cases of bowel cancer diagnosed increased from 6,985 in 1982 to 14,958 in 2012.
Over the same period, the age-standardised incidence rate increased from 58 cases per 100,000 persons in 1982 to 59 cases per 100,000 persons in 2012.
The number of deaths from bowel cancer increased from 2,500 in 1968 to 4,162 in 2013.
Over the same period, the age-standardised mortality rate decreased from 31 deaths per 100,000 persons in 1968 to 16 deaths per 100,000 in 2013.
Note: Incidence rates available for 1982–2012, and mortality rates available for 1968–2013.
Source: Australian Institute of Health and Welfare1
In 2008–2012 in Australia, individuals diagnosed with bowel cancer had a 68% chance of surviving for 5 years compared to their counterparts in the general Australian population.
Between 1983–1987 and 2008–2012, 5-year relative survival from bowel cancer improved from 48% to 68%.
Source: AIHW analysis of the Australian Cancer Database, (see source table 2).
The prevalence for 1, 5 and 29 years given below are the number of people living with bowel cancer at the end of 2010 who had been diagnosed in the preceding 1, 5 and 29 years respectively.
At the end of 2010, there were 13,171 people living who had been diagnosed with bowel cancer that year.
At the end of 2010, there were 50,615 people living who had been diagnosed with bowel cancer in the previous 5 years (from 2006 to 2010).
At the end of 2010, there were 120,227 people living who had been diagnosed with bowel cancer in the previous 29 years (from 1982 to 2010).
More information on bowel cancer from Cancer Australia
Cancer, like other health conditions, is classified by the International Statistical Classification of Diseases and Related Health Problems Version 10 (ICD-10). This is a statistical classification, published by the World Health Organization, in which each morbid condition is assigned a unique code according to established criteria.
Future estimates for incidence and mortality are a mathematical extrapolation of past trends. They assume that the most recent trends will continue into the future, and are intended to illustrate future changes that might reasonably be expected to occur if the stated assumptions continue to apply over the estimated period. Actual future cancer incidence and mortality rates may vary from these estimations for a variety of factors. New screening programs may increase the detection of new cancer cases; new vaccination programs may decrease the risk of developing cancer; and improvements in treatment options may decrease mortality rates.
Due to the rounding of these estimates, male and female incidence and mortality may not sum to person incidence and mortality.
Cancer incidence indicates the number of new cancers diagnosed during a specified time period (usually one year).
Cancer mortality refers to the number of deaths occurring during a specified time period (usually one year) for which the underlying cause of death is cancer.
Prevalence of cancer refers to the number of people alive with a prior diagnosis of cancer at a given time. It is distinct from incidence (see above). The longest period for which it is possible to calculate prevalence using the available national data (from 1982 to 2010) is currently 29 years. This span is used to estimate the 'total' prevalence of cancer at the end of 2010, noting that people diagnosed with cancer before 1982 are not included.