Health, United States: Heart Disease Prevalence

This CDC NCHS surveillance report tracks the age-adjusted prevalence of heart disease in US adults from 2009 to 2019 using National Health Interview Survey data. Heart disease here is defined by self-reported physician-diagnosed coronary heart disease, angina, or prior heart attack — a definition that captures recognized clinical disease but misses the substantial subclinical burden.

The trend from 2009 to 2019 shows a modest decline: age-adjusted prevalence fell from 6.2% to 5.5% in adults overall. Men showed the larger decline (8.3% to 7.0%), women a smaller one (4.6% to 4.2%). Men consistently carry higher prevalence throughout the period.

The age gradient is the most instructive dimension. Among adults aged 18–44, diagnosed heart disease prevalence is 1.0%. It rises to 3.6% at ages 45–54, 9.0% at 55–64, 14.3% at 65–74, and 24.2% at 75 and older. This exponential increase with age documents the natural history of coronary artery disease — decades of subclinical progression followed by clinical manifestation, typically in the sixth decade and beyond.

The implication for early detection is direct. The patient aged 45–54 with a 3.6% prevalence of recognized CHD is the patient in whom subclinical disease — detectable by coronary calcium score or CT angiography — is most likely to be present and most amenable to primary prevention intervention before the first event. Waiting for clinical presentation converts the 14% who develop CHD between ages 55 and 64 into a secondary prevention population rather than a primary prevention one.

We rate the evidence strong. This CDC NCHS prevalence surveillance report, based on NHIS data from 2009–2019, documents the age and sex distribution of recognized heart disease in US adults — providing the epidemiological foundation for understanding when in the life course cardiovascular risk assessment and prevention intervention are most impactful.