Ruqayyah Snyder
Australia has one of the highest cancer incidence rates in the world, with the number of cases increasing from 88,000 in 2000 to 106,903 in 2015. This figure is projected to reach 507 cases per 100,000 people in 2022. The high cancer rate in Australia is attributed to various factors, including population growth and ageing, and exposure to risk factors such as tobacco use, physical inactivity, high body mass index, alcohol consumption, and environmental factors. Successful tobacco control interventions have contributed to a decrease in cancer cases and deaths related to lung cancer and other types of cancer associated with smoking. However, the incidence of lung cancer among females is on the rise, highlighting the need for continued efforts in tobacco control and the development of effective screening and treatments.
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What You'll Learn
Tobacco use, physical inactivity, high BMI, alcohol, poor diet, and pollution
Australia has one of the highest cancer incidence rates in the world. In 2022, the age-standardised incidence rate was 507 cases per 100,000 persons. The number of cancer cases is expected to increase with age, with the highest rates for those aged 85–89 years. Almost one in two Australian men and women will be diagnosed with cancer by the age of 85.
Tobacco use, physical inactivity, high BMI, alcohol consumption, poor diet, and pollution are significant factors contributing to the high cancer rate in Australia. Tobacco smoke is the leading cause of cancer deaths and cases in the country. Smoking and second-hand smoke exposure increase the risk of various cancer types, including lung, colorectum, head and neck, stomach, bladder, ovary, oesophagus, and cervix cancers. Australia's successful tobacco control interventions have led to decreased cancer incidence and mortality rates for these associated cancers. However, continued efforts in tobacco control and lung cancer screening and treatments remain crucial public health priorities.
Physical inactivity and high body mass index (BMI) are also risk factors for cancer. People with a high BMI have an increased risk of developing specific cancers, and a sedentary lifestyle contributes to the burden of cancer in Australia. Alcohol consumption is another modifiable factor that increases cancer risk. Alcohol is estimated to account for a portion of the total cancer burden in the country.
Poor diet, including low fruit and vegetable consumption and a high intake of red and processed meat, is also a contributing factor to the high cancer rate in Australia. Inadequate consumption of fruits, non-starchy vegetables, and dietary fibre can increase the risk of certain cancers. Pollution, including air pollution and exposure to ultraviolet radiation, is another factor that impacts cancer rates in Australia. These environmental factors, along with reproductive factors, infections, and occupational exposures, contribute to the overall cancer burden in the country.
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Successful tobacco control interventions
Australia has one of the highest cancer incidence rates in the world. In 2020, the number of deaths from cancer had increased to 48,266 from 24,915 in 1982. The age-standardised mortality rate, however, decreased from 209 deaths per 100,000 persons in 1982 to 148 deaths per 100,000 in 2020. The age-standardised incidence rate is expected to increase from 504 cases per 100,000 persons in 2018 to 507 cases per 100,000 in 2022.
The high cancer rate in Australia is attributed to various factors, with tobacco being the leading cause of cancer deaths and cases. Other factors include dietary factors (low intake of fruits, non-starchy vegetables, and dietary fibre, and high intake of red and processed meat), overweight/obesity, alcohol, physical inactivity, solar ultraviolet radiation, infections, and reproductive factors.
Australia has implemented comprehensive tobacco control policies, including public awareness campaigns, smoke-free legislation, graphic health warnings on tobacco products, plain packaging, and increased taxes on tobacco products. These measures have effectively reduced tobacco consumption and protected people from second-hand smoke exposure.
Public awareness campaigns have played a crucial role in educating the public about the harmful effects of tobacco use. Australia was one of the first countries to introduce graphic health warnings on tobacco packages, depicting the negative consequences of smoking, such as damaged teeth, diseased lungs, and premature ageing. These warnings have been effective in discouraging tobacco use, particularly among youth.
Smoke-free legislation has been instrumental in creating smoke-free public spaces and workplaces, protecting non-smokers from second-hand smoke exposure. Australia has enforced comprehensive smoke-free laws, prohibiting smoking in indoor public places, restaurants, bars, and workplaces. This has resulted in a significant reduction in involuntary smoke exposure and improved air quality in public spaces.
Additionally, Australia introduced plain or standardised packaging for tobacco products, removing attractive branding and ensuring that health warnings are more prominent. This measure has decreased the appeal of tobacco products, particularly to youth, and increased the noticeability and effectiveness of health warnings. The removal of branding also reduces the ability of tobacco companies to use packaging as a marketing tool, further contributing to a decline in tobacco consumption.
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Population growth and ageing
Furthermore, as the population ages, the incidence of cancer increases. Older individuals have a higher risk of developing cancer, and this trend is observed in Australia. The cancer incidence rate is projected to be highest for those aged 85-89 years, indicating the impact of population ageing on cancer rates.
The increase in life expectancy and improvements in cancer survival rates also contribute to the growing number of cancer cases. In the years 2016-2020, the five-year survival rate for cancer was approximately 71%, a significant improvement from the 55% survival rate in the 1991-1995 period. The increasing gap between incidence and mortality rates due to better survival rates further contributes to the high cancer rate in Australia.
Moreover, the ageing population in Australia also faces a higher risk of cancer due to the cumulative effects of exposure to risk factors over their lifetimes. This includes exposure to environmental factors, lifestyle choices, and behavioural risks, such as tobacco use, physical inactivity, and unhealthy dietary habits.
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Survival rates
The survival rate varies depending on the type of cancer. For some cancers, such as breast, prostate, and melanoma, the survival rate is higher than 90%. Melanoma, for instance, has had a survival rate of a little over 90% for the years 1996-2000.
The number of cancer cases and deaths in Australia has been decreasing over the years, which has resulted in improved survival rates. During the period 1996–2015, there were 106,903 (20.6%) fewer cancer deaths than expected based on the 1995 mortality rates. This decrease is attributed to the successful tobacco control interventions in the country. However, an increase in the incidence of lung cancer was observed among females, highlighting the need for continued efforts in tobacco control and the development of effective screening and treatments.
Population growth and ageing, changes in exposure to risk factors, and advancements in cancer prevention, diagnosis, and treatment are some of the factors that influence future patterns of cancer incidence and mortality in Australia. Projections indicate that prostate cancer and female breast cancer will remain the most commonly diagnosed cancers in the country.
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Cancer as a leading cause of death
Cancer is a leading cause of death worldwide, and in 2012, it was responsible for an estimated 8.2 million deaths globally. In Australia, cancer is also a leading cause of disease burden, particularly fatal burden, accounting for around 30% of deaths. The number of cancer-related deaths in the country increased from 24,915 in 1982 to 48,266 in 2020.
The most common cancers in Australia are prostate, breast, melanoma, colorectal, and lung cancer. Melanoma rates, for instance, have increased from 53 cases per 100,000 people in 2000 to an estimated 70 cases per 100,000 people in 2024. The overall age-standardised cancer incidence rate in Australia has also increased, from 350.7 in 1995 to 364.4 per 100,000 in 2015. In 2018, the age-standardised incidence rate was 504 cases per 100,000 persons, and it is expected to increase with age, with the highest rates for those aged 85–89 years.
The increase in cancer cases in Australia is largely due to population growth and an ageing population. Cancer Australia, established by the Australian Government in 2006, aims to reduce the impact of cancer and improve outcomes for those affected by it.
Tobacco smoke is the leading cause of cancer deaths and cases in Australia, followed by dietary factors, overweight/obesity, and infections. Together, tobacco, physical inactivity, high body mass index (BMI), alcohol consumption, occupational hazards, poor diet, air pollution, and unsafe sex have been estimated to account for one-third of the total cancer burden in Australia. Lifestyle and environmental factors are significant contributors to cancer, and addressing these through cancer control programs and public health policies can help reduce the future burden of the disease.
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Frequently asked questions
In 2018, the age-standardised cancer incidence rate was 504 cases per 100,000 persons. In 2022, it is estimated to be 507 cases per 100,000 persons.
There are many factors contributing to the high cancer rate in Australia. These include population growth and ageing, changes in exposure to risk factors, and developments in cancer prevention, diagnosis, and treatment. Lifestyle and environmental factors also play a role, with tobacco smoke, poor diet, overweight/obesity, alcohol consumption, and physical inactivity being significant contributors.
The most common types of cancer in Australia are prostate, breast, melanoma, colorectal, and lung cancer.
The overall age-standardised cancer incidence rate increased from 350.7 in 1995 to 364.4 per 100,000 in 2015. However, the overall age-standardised cancer mortality rate decreased from 125.6 in 1995 to 84.3 per 100,000 in 2015.
