how common is narcolepsy

Narcolepsy is uncommon : a recent U.S. general-population study estimated about 37.7 per 100,000 people, or roughly 1 in 2,650, and concluded it affects about 126,191 people in the current U.S. population. A commonly cited public- health estimate is about 1 in 2,000 people in the United States, which is roughly 200,000 Americans and about 3 million people worldwide.

What that means

• It is considered a rare sleep disorder, not a common one.

• Estimates vary because narcolepsy is often underdiagnosed or misdiagnosed.

• Reported U.S. figures in public sources range from about 125,000 to 200,000 people.

Simple takeaway

If you want the shortest answer: narcolepsy is rare, but not vanishingly rare — think roughly 1 in 2,000 to 1 in 2,650 people in U.S.-based estimates.

Quick context

It usually starts in the teens through middle adulthood, and men and women are generally affected at similar rates. Because symptoms can look like other sleep or neurological problems, many cases are missed at first.