How to interpret your cardiovascular risk score

Receiving a cardiovascular risk percentage can feel abstract, or even worrying, without the right way to read it. Here's how to make sense of that number, step by step.

What “10-year risk” actually means

A score of 5% doesn't mean an event will happen “a little.” It means that, out of 100 people with exactly the same profile (age, sex, blood pressure, cholesterol, smoking), about 5 will have a cardiovascular event in the next 10 years, and 95 will not. It's a statistical probability applied to a profile, not a certain individual prediction. This nuance is essential: it means a high result in no way guarantees an event will occur, just as a low result doesn't fully rule one out — it's a matter of relative probability, not absolute certainty.

What the percentage actually counts

SCORE2 estimates the risk of having a fatal or non-fatal cardiovascular event within ten years: heart attack, stroke, or death from cardiovascular causes. This is an important difference from the older SCORE score, which only counted deaths. For the same profile, the number shown today is therefore higher than it used to be, without the actual risk having changed: it simply describes more events.

The result also depends on the country. SCORE2 equations are adjusted for four major regions of Europe, based on how common cardiovascular disease is in each. France belongs to the so-called “low-risk” region, along with Spain, Belgium, and the United Kingdom. The same person would get a higher percentage using the equations of an Eastern European country, where these diseases are more common.

The same percentage doesn't mean the same thing at every age

This is the point most often misunderstood: the thresholds that define “high” or “very high” risk change with age. A 6% risk doesn't carry the same clinical meaning at 45 as it does at 72:

• Before age 50: a risk of 2.5 to 7.5% is already considered high
• Between ages 50 and 69: the high-risk threshold is between 5 and 10%
• From age 70 onward (SCORE2-OP): between 7.5 and 15%

This gradation exists because, at the same age, a lower risk in a young person already reflects a buildup of unfavorable factors that is more concerning in the long run than an equivalent risk in an older person, for whom this level of risk is more expected simply with the passage of time. In other words, it isn't the raw number that matters, but its relative position compared with what is statistically “normal” for that age group.

Why this age-based gradation was chosen

This methodological choice reflects a simple biological reality: cardiovascular risk mechanically increases with age, independent of any modifiable risk factor. Without this gradation, nearly all older people would end up classified as high risk, even with an impeccable lifestyle and no particular risk factor — which would make the tool poor at distinguishing which older people have a genuinely concerning profile compared with their peers of the same age.

Why the result may (or may not) point toward treatment

The risk level obtained serves as a basis for a discussion with a doctor about whether preventive treatment, especially statins, might be worthwhile. This is never automatic: the decision takes into account the risk level, but also the person's preferences, any other relevant clinical factors, and a shared discussion of expected benefits versus the potential side effects of long-term treatment.

A concrete example to help you orient yourself

Take an illustrative example: a 55-year-old man, a non-smoker, with blood pressure and cholesterol at the high end of normal, might get a score of 4%. Based on the reference grid for his age group (50-69), this result would fall into the “low to moderate risk” category, below the 5% threshold that marks entry into the “high risk” category. That same 4% score obtained by a 40-year-old man, on the other hand, would already exceed the high-risk threshold for his age group (2.5 to 7.5%) — concretely illustrating why a person's age completely changes how the same raw number is interpreted.

The idea of “cardiovascular age,” a useful complement

Some tools derived from SCORE2 offer, alongside the risk percentage, an estimate of “cardiovascular age” — that is, the age at which an average-risk person, with no particular risk factor, would reach the same risk level as the one calculated. A 45-year-old with an estimated cardiovascular age of 58, for example, gets a more vivid picture of the gap between their actual risk and what's expected for their age than a simple isolated percentage would give. This framing, while not universally used, often proves pedagogically effective for conveying the importance of early management.

Absolute risk, relative risk, and lifetime risk

The percentage shown is an absolute risk: the probability that an event will occur. It's often confused with relative risk, which compares two situations. Saying that smoking “doubles the risk” is a relative risk. Its real-world effect depends on the starting point: doubling a 1% risk gives 2%, while doubling an 8% risk gives 16%. This is why the same factor weighs more heavily in someone whose baseline risk is already high.

In young people, 10-year risk is almost always low, even when several factors are present, simply because events are rare at that age. European guidelines therefore also suggest thinking in terms of lifetime risk: factors present from age 35 or 40 act for decades, and correcting them early brings the greatest benefit.

Different thresholds in the United States

In the United States, doctors use different equations, those of the American College of Cardiology and the American Heart Association, which estimate atherosclerotic cardiovascular disease risk, or ASCVD. The categories there don't depend on age: risk is considered low under 5%, borderline from 5 to 7.5%, intermediate from 7.5 to 20%, and high above 20%. A new model, called PREVENT, was published in 2023 by the American Heart Association; it adds heart failure and accounts for kidney function. Worldwide, the World Health Organization (WHO) published risk charts adapted to 21 regions of the world in 2019. These tools don't give exactly the same number for the same person, a reminder that a score is a reference point, not an exact measurement.

What the score doesn't measure

It's also important to understand the tool's limits: SCORE2 doesn't account for certain elements that can shift a person's actual risk, such as very early family history, certain chronic inflammatory diseases, or more specialized biological markers (such as lipoprotein(a), a genetic risk factor still rarely tested for in routine practice). In certain specific situations, a doctor can adjust their interpretation of the result in light of these additional factors, which aren't part of the standard calculation.

An assessment to repeat over time

Cardiovascular risk isn't fixed: it changes with age, but also with lifestyle changes or the appearance of new factors. European guidelines suggest repeating this assessment periodically, for example every 5 years in someone with no particular risk factor — or more often after a notable change (weight gain, a new diagnosis of high blood pressure, quitting or resuming smoking). Repeating the assessment over time also makes it possible to concretely measure the effect of changes made, which can itself be an additional source of motivation.

The takeaway

A cardiovascular risk result, whatever it is, is never set in stone: it's a starting point for action, not a final verdict. A high risk today doesn't prevent you from lowering it tomorrow, through concrete changes to the modifiable factors identified — which is exactly what the next articles on this blog are about.

To get your own estimate, take the “What's my cardiovascular risk?” test.