CHD risk is your likelihood of developing coronary heart disease, a condition where fatty deposits called plaque build up inside the arteries that supply blood to your heart. About 1 in 20 American adults age 20 and older have coronary heart disease, and it killed over 371,000 people in 2022. Your personal CHD risk depends on a combination of factors you can control, like cholesterol and blood pressure, and factors you can’t, like age and family history.
What Happens Inside Your Arteries
Coronary heart disease starts with damage to the inner lining of an artery wall. Once that lining is compromised, white blood cells move in and begin absorbing cholesterol particles, particularly the “bad” LDL type. These cholesterol-stuffed cells, called foam cells, pile up beneath the artery wall and form a fatty streak. Over time, smooth muscle cells migrate to the area, produce a fibrous cap over the fatty deposit, and the whole structure hardens with calcium. The result is a plaque that narrows the artery and restricts blood flow to your heart muscle.
This process, atherosclerosis, can take decades. Small calcium deposits gradually grow into larger sheets and plates. If a plaque becomes unstable and ruptures, it can trigger a blood clot that blocks the artery entirely. That’s a heart attack.
Risk Factors You Can’t Change
Some of the strongest predictors of CHD are baked into your biology. Age is the most straightforward: the longer your arteries have been exposed to wear and damage, the more plaque accumulates. Men develop CHD earlier on average, though women’s risk rises sharply after menopause as the protective effects of estrogen decline. Women who go through early menopause (before age 40) have roughly two fewer years of life expectancy compared to those with normal or late menopause, and young women with estrogen deficiency face more than a sevenfold increase in coronary artery risk.
Family history matters significantly. Having a first-degree relative (parent or sibling) with coronary heart disease roughly doubles or triples your own risk. That association gets stronger the more relatives are affected and the younger they were at diagnosis. A strong family history of early-onset CHD (before age 60) is associated with approximately a fivefold increase in risk for early coronary disease, while a moderate family history is linked to about a twofold increase.
Risk Factors You Can Control
Cholesterol
High LDL cholesterol is one of the most well-established drivers of CHD. For adults 20 and older, a healthy LDL level is below 100 mg/dL, with total cholesterol under 200 mg/dL. HDL cholesterol, the “good” kind, helps clear fatty deposits from artery walls. Levels of 60 mg/dL or higher are ideal. For men, HDL below 40 mg/dL is considered low; for women, that threshold is 50 mg/dL.
Blood Pressure
High blood pressure forces your heart to work harder and damages artery walls, accelerating plaque formation. The 2025 guidelines from the American Heart Association and American College of Cardiology define the categories as follows:
- Normal: below 120/80 mmHg
- Elevated: 120 to 129 systolic with diastolic still below 80
- Stage 1 hypertension: 130 to 139 systolic or 80 to 89 diastolic
- Stage 2 hypertension: 140 or higher systolic, or 90 or higher diastolic
Smoking
Smoking is a potent independent risk factor. In people with high blood pressure, smokers have an 87% higher risk of coronary heart disease events compared to nonsmokers. Among women with type 2 diabetes, smoking 15 or more cigarettes per day nearly triples CHD risk. Even light smoking (under 15 cigarettes daily) raises risk by about 66%. The damage is compounding: smoking amplifies whatever other risk factors you already carry.
Diabetes
Diabetes accelerates artery damage through chronically elevated blood sugar. In people with hypertension, having diabetes raises the risk of cardiovascular death by about 69%. Women with gestational diabetes during pregnancy face 7 to 12 times the risk of developing type 2 diabetes later, which in turn raises their long-term CHD risk.
Obesity
Excess weight increases cardiovascular disease risk, but where the fat sits matters more than the number on the scale. Waist circumference is a better predictor of CHD risk than BMI. People with a normal BMI but a large waist are at greater risk than their weight alone would suggest, because abdominal fat is more metabolically active and promotes the kind of inflammation that drives plaque formation.
How CHD Risk Is Calculated
Doctors typically estimate your 10-year risk of a cardiovascular event using a tool called the ASCVD Risk Estimator. It takes into account your age, sex, race, systolic and diastolic blood pressure, whether you take blood pressure medication, smoking status, total cholesterol, HDL, LDL, and whether you have diabetes. The output is a percentage representing your chance of having a heart attack or stroke within the next decade.
A 10-year risk below 5% is generally considered low. Between 5% and 7.5% is borderline. From 7.5% to 20% is intermediate, and above 20% is high. These thresholds help guide decisions about whether lifestyle changes alone are sufficient or whether medication should be considered.
Beyond the standard calculator, inflammation markers can refine your risk picture. High-sensitivity C-reactive protein (hs-CRP), a blood test that measures systemic inflammation, is considered one of the best predictors of coronary disease. Levels at or above 2 mg/L signal meaningful inflammation. Another marker, lipoprotein(a), is a genetically determined form of cholesterol that raises cardiovascular risk, but primarily when inflammation is also elevated. Each unit increase in lipoprotein(a) is associated with a 13% higher risk of heart attack, stroke, or cardiovascular death, but only in people whose hs-CRP is 2 mg/L or above.
CHD Risk in Women
Women’s CHD risk has distinct features that standard calculators can miss. Estrogen appears to protect arteries during the reproductive years, which is why women typically develop coronary disease about a decade later than men. But after menopause, artery function declines measurably, and plaque composition shifts toward more unstable, inflammation-prone lesions.
Pregnancy complications also signal future risk. Women who had preeclampsia (dangerously high blood pressure during pregnancy) face double the risk of CHD later in life compared to women with normal pregnancies. Those who experienced both a placental complication and poor fetal growth are at the greatest long-term risk.
Symptoms also differ. Women are more likely to experience chest pain that doesn’t correlate with large-artery blockages, which can lead to misdiagnosis. Women under 55 with unstable chest pain are frequently misdiagnosed in the emergency department. During heart attacks, women tend to have more accompanying symptoms like nausea, dizziness, and fatigue that can mask the chest pain, sometimes with less obvious changes on an EKG, particularly at younger ages.
How Much Lifestyle Changes Lower Risk
The good news is that modifiable risk factors respond to behavioral changes, often substantially. The landmark PREDIMED trial found that following a Mediterranean diet supplemented with extra-virgin olive oil or nuts reduced cardiovascular events by 30% compared to a low-fat diet. A separate large study found that vegetarians had a 13% lower risk of developing coronary heart disease compared to meat eaters.
Physical activity is dose-dependent: the more you do, the more protection you get. The American Heart Association recommends at least 150 minutes of moderate-intensity aerobic exercise per week (like brisk walking) or 75 minutes of vigorous exercise (like running). These are minimums. Greater volumes of activity generally lead to greater risk reduction. Combining regular exercise with a heart-healthy diet, maintaining a healthy waist circumference, not smoking, and managing blood pressure and cholesterol creates a compounding protective effect that can dramatically shift your 10-year risk number downward.