Cardiovascular risk factors: modifiable and non-modifiable

Cardiovascular risk factors fall into two broad categories: those you can act on, and those that are already set. Understanding this distinction helps you know where to focus your efforts, without spreading yourself thin or feeling guilty about ground you didn't choose.

Non-modifiable factors

These factors can't be changed, but simply knowing them refines the overall risk assessment:

• Age — cardiovascular risk mechanically increases over time, due to the natural aging of artery walls and the gradual accumulation of years of exposure to other factors
• Sex — before age 70, two-thirds of heart attacks occur in men; this gap narrows after menopause in women, then disappears after age 75, as the protective effect of natural estrogen fades with age
• Early family history — a heart attack in the father before age 55, or in the mother before age 65, signals a genetic predisposition worth taking into account, even with no other risk factor present

Modifiable factors

These are the real target of prevention, since acting on them can genuinely lower overall risk:

• Smoking — from the very first daily cigarette, and for up to 3 years after quitting for a former smoker, before the risk gradually matches that of a non-smoker
• High blood pressure — often silent, it progressively damages artery walls with no noticeable symptom
• Cholesterol — particularly high LDL-cholesterol (“bad” cholesterol), and conversely low HDL-cholesterol (“good” cholesterol, protective beyond a certain level)
• Diabetes — type 1 as well as type 2, with a particularly marked relative risk for arterial complications, a topic covered in detail on the dedicated diabetes blog
• Obesity, particularly abdominal obesity, whose metabolic impact goes beyond the simple question of weight
• Sedentary behavior, an independent risk factor even in someone who is otherwise of normal body size

Very widespread factors

These modifiable factors affect a large part of the population. In France, nearly one adult in three has high blood pressure, or about 17 million people according to Santé publique France, and many don't know it. Nearly one adult in four smokes (24% in 2024), 18.1% have obesity according to the OFÉO 2024 study, and more than 4 million people are treated for diabetes. In the United States, nearly half of adults have high blood pressure according to the CDC, and 40.3% have obesity. Worldwide, the World Health Organization (WHO) estimates 1.4 billion adults have high blood pressure.

The international INTERHEART study, conducted in 52 countries and published in 2004 in The Lancet, showed the weight of these factors. Nine of them, all modifiable, accounted on their own for about 90% of heart attack risk: smoking, cholesterol abnormalities, high blood pressure, diabetes, abdominal obesity, psychosocial stress, a diet low in fruits and vegetables, lack of physical activity, and alcohol consumption. The WHO draws an encouraging conclusion from this: the vast majority of premature heart attacks and strokes could be prevented.

Special situations worth knowing about

Some elements don't appear in the classic lists, but they do change risk and are worth mentioning to your doctor.

In women, pregnancy complications such as gestational hypertension, preeclampsia, or gestational diabetes are associated with higher cardiovascular risk years later. Early menopause, before age 40, has the same effect. Cardiovascular disease is, in fact, the leading cause of death in women in France, even though it is often still perceived as a men's disease.

Chronic inflammatory diseases, such as rheumatoid arthritis or severe psoriasis, chronic kidney disease, and certain geographic backgrounds, notably South Asian ancestry, also increase risk. Finally, socioeconomic hardship weighs heavily: financial difficulties, isolation, and demanding working conditions are associated with more cardiovascular events, for an equal level of other risk factors.

Why this distinction matters in practice

Knowing your non-modifiable factors isn't meant to make you feel guilty about ground you didn't choose — it helps calibrate vigilance: someone with a strong family history has all the more reason to carefully manage their modifiable factors, since their “starting point” is already less favorable. Conversely, someone with no notable family history still has real room to act on all their modifiable factors, without this protecting them from increased risk if those modifiable factors go unmanaged.

The cumulative effect over time

An often underestimated point: the impact of a modifiable risk factor also depends on how long you've been exposed to it, not just its presence or intensity at a given moment. High blood pressure detected and treated early has a much smaller cumulative impact on the arteries than high blood pressure left undiagnosed for 15 years, even if the blood pressure level measured is identical at the time of diagnosis. This is an additional argument in favor of early, regular screening for all of these factors, rather than waiting for symptoms that, for many of them, only appear late.

Emerging risk factors, less well known but real

Beyond the classic factors already mentioned, research is gradually identifying other elements associated with cardiovascular risk, though without yet the same level of evidence or the same integration into standard calculation tools. Among them: sleep quality and duration, where chronic deficiency is associated with higher cardiovascular risk; chronic psychosocial stress and burnout, a topic covered in a dedicated article on the Hygietest blog; and certain biological inflammatory markers, still reserved for specific clinical situations. These factors don't replace the classic risk factors in overall assessment, but deserve to be kept in mind for a genuinely thorough approach to prevention.

The role of diet, a cross-cutting factor

Diet deserves a mention of its own, because it simultaneously influences several of the modifiable risk factors already mentioned: it affects weight, blood pressure (notably through salt intake), lipid profile (the type of fat consumed), and blood sugar. A Mediterranean-style diet — rich in vegetables, fruit, fish, and olive oil, and low in ultra-processed food — is associated in many studies with a significant reduction in overall cardiovascular risk, precisely because it acts on several levers at once rather than a single isolated factor.

Sleep, a cross-cutting factor too

Less often listed in classic cardiovascular risk factor grids, sleep nonetheless plays a documented role: chronically insufficient or poor-quality sleep is associated with higher blood pressure, easier weight gain, and disrupted blood sugar regulation — three mechanisms that, in turn, raise overall cardiovascular risk. Sleep apnea, in particular, is a risk factor in its own right, well enough documented to justify a dedicated screening tool, available on Hygietest.

Each factor deserves precise assessment

Rather than relying on a general impression, each modifiable factor can be assessed with a dedicated tool — that's exactly what the other tests on Hygietest are for: smoking, blood pressure, weight, alcohol consumption, or physical activity level each have their own screening tool, to refine your understanding of your risk profile beyond the overall score alone. This factor-by-factor approach also helps prioritize action: a factor far from recommended levels will usually have more impact if corrected first than one already close to normal — a prioritization a doctor can help establish on a personalized basis.

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