Introduction to CFS: Demographics
Diagnosis Introduction What Causes CFS?

Who gets CFS?

How many people get CFS?

Because there is no definitive test to identify CFS--or even agreement about what CFS is--estimates of its prevalence vary widely. Recent studies have found between 75 and 420 cases of CFS for every 100,000 adults in the United States. If the rate is 200 cases per 100,000 people, that would mean 500,000 adult Americans have CFS. That is considerably higher than the rate of, say, Multiple Schlerosis.

Breakdown

Far more women than men get CFS. Minorities and low income people are slightly more likely to have CFS. People of all ages get CFS, though we don't know the prevalence for children and adolescents. Among minors with CFS, about half are boys and half girls.

Grouping

CFS occurs both in isolated cases and large-scale outbreaks. Blood relatives of people who have CFS are more likely to get it.

Diagnosis Introduction What Causes CFS?