Absolute cardiovascular risk is an estimate of a person’s chance of experiencing a cardiovascular event, such as a heart attack or stroke, over a specific period. It is calculated by considering multiple risk factors together rather than relying on one measurement alone. In current Australian practice, the Aus CVD Risk Calculator estimates a person’s cardiovascular risk over the next five years.
Understanding what this estimate means, which factors contribute to it, and what a GP may discuss after calculating it can help adults make informed decisions about preventive health.
Key Takeaways
- Absolute CVD risk considers several factors together, not just one result
- Australia’s current calculator estimates five-year cardiovascular risk
- One cholesterol or blood-pressure result does not determine overall risk
- Current Australian categories are low, intermediate and high
- A risk percentage is an estimate, not a certainty about what will happen
Why Is Absolute Cardiovascular Risk More Useful Than Looking at One Risk Factor?
Two adults with the same cholesterol level may have very different overall cardiovascular risk because age, blood pressure, smoking status, diabetes and other factors also contribute. Looking at one test result in isolation does not give the full picture.
The Heart Foundation specifically states that an individual’s CVD risk depends on the combined effect of multiple risk factors rather than any single measurement. Considering these factors together provides a more complete estimate of cardiovascular risk and helps guide discussions about prevention and follow-up.
How Is Cardiovascular Risk Calculated in Australia?
Australia currently uses the Aus CVD Risk Calculator, introduced as part of the 2023 Australian Guideline for Assessing and Managing Cardiovascular Disease Risk. This calculator replaced the previous Framingham-based approach used in earlier Australian guidelines. Therefore, older risk categories should not be applied when interpreting results from the current Australian calculator.
The calculator can consider factors including:
- Age
- Sex at birth
- Smoking status
- Systolic blood pressure
- Total cholesterol-to-HDL ratio
- Diabetes status
- Current use of cardiovascular medicines
Depending on circumstances, additional information such as atrial fibrillation, postcode and diabetes-specific variables can also contribute to the overall estimate. For more background on how comprehensive cardiovascular risk assessment is used in Australian primary care, the Heart Foundation’s Heart Health Check information provides a useful overview.
What Does a 5-Year Cardiovascular Risk Score Mean?
A five-year CVD risk score is an estimated probability, not a prediction that an event definitely will or will not occur. The percentage represents the estimated probability of experiencing a cardiovascular event over the next five years. The risk estimate includes cardiovascular outcomes such as heart attack and stroke, along with other conditions considered within the Australian risk model.
Current Australian risk categories are:
| Australian CVD risk category | Estimated 5-year CVD risk |
| Low | Less than 5% |
| Intermediate | 5% to less than 10% |
| High | 10% or more |
These categories help guide clinical discussion and management planning. They should not be interpreted as certainties about any individual’s future health. A GP interprets the result alongside your medical history and broader clinical circumstances.
Who Should Have Cardiovascular Risk Assessed in Australia?
For people without known cardiovascular disease, current Australian guidance recommends formal CVD risk assessment for:
- Adults aged 45 to 79 years without known cardiovascular disease are generally considered for formal CVD risk assessment.
- Adults with diabetes aged 35 to 79 years
- First Nations people aged 30 to 79 years
For First Nations adults aged 18 to 29, individual cardiovascular risk factors should be assessed even before formal calculator-based assessment applies.
If you are unsure whether cardiovascular risk assessment is appropriate for you, a preventive health assessment can help a GP review your age, medical history and individual risk factors.
Does Everyone Need the Standard CVD Risk Calculator?
No. The Aus CVD Risk Calculator is intended for people without known CVD who fall within the recommended assessment groups. This includes people with moderate-to-severe chronic kidney disease and those with confirmed familial hypercholesterolaemia.
This includes people with moderate-to-severe chronic kidney disease and those with confirmed familial hypercholesterolaemia. In these situations, a GP may manage cardiovascular risk differently based on clinical findings rather than a calculated percentage.
What Happens During a GP Cardiovascular Risk Assessment?
A GP may review several areas during a cardiovascular risk assessment, including:
- Personal and family medical history
- Smoking status and history
- Blood pressure measurement
- Cholesterol results
- Diabetes status and management
- Relevant medicines
- Other risk factors or clinical considerations
Where cholesterol or blood glucose testing is clinically indicated, a GP may arrange blood tests. Where blood tests are clinically indicated, a GP may arrange pathology testing, including tests that assess factors such as cholesterol or blood glucose levels.
What Happens After Your Cardiovascular Risk Is Calculated?
The result is the beginning of a conversation, not a final verdict. Next steps depend on the estimated risk category, individual risk factors, medical history and patient preferences.
A GP may discuss:
- Smoking cessation where relevant
- Physical activity and nutrition
- Blood pressure management
- Cholesterol management
- Diabetes care and monitoring
- Follow-up appointments or repeat testing
- Medicines where clinically appropriate based on the overall risk profile
The 2023 Australian guideline specifically emphasises communicating risk clearly and supporting shared decision-making rather than simply presenting a percentage. Management is based on the individual’s overall risk picture.
Cardiovascular Risk Assessment in Paterson
Paterson Healthcare offers health assessment services that may include review of cardiovascular risk factors depending on individual circumstances. Further testing, monitoring or follow-up depends on individual circumstances and what the GP finds during assessment.
If you would like to discuss your cardiovascular risk factors or whether a health assessment is suitable for you, contact Paterson Healthcare to arrange a GP appointment.
FAQs
What does absolute cardiovascular risk mean?
It is an estimate of the probability of experiencing a cardiovascular event over a set period based on several risk factors considered together. Current Australian assessment uses an estimated five-year CVD risk.
Does high cholesterol automatically mean high cardiovascular risk?
No. Cholesterol is important, but overall CVD risk also depends on factors such as age, blood pressure, smoking, diabetes and other clinical information considered together.
What is considered high cardiovascular risk in Australia?
Under current Australian guidance, an estimated five-year CVD risk of 10% or more is classified as high risk. A GP may also identify clinically determined high risk in certain conditions such as chronic kidney disease or familial hypercholesterolaemia.
Can cardiovascular risk change over time?
Yes. Risk can change as factors such as age, smoking status, blood pressure, cholesterol and diabetes management change. The timing of reassessment depends on individual risk and clinical circumstances.
Can a low cardiovascular risk mean I have no heart disease risk?
No. A low estimated risk does not mean cardiovascular disease is impossible. Risk assessment helps estimate overall likelihood and should be considered alongside personal health factors.