A member asked:

Can you tell me how common is delayed phase sleep syndrome?

A doctor has provided 1 answer
Dr. Heidi Fowler answered

Specializes in Psychiatry

Not known: The incidence of delayed sleep phase syndrome (dsps) isn't known. A recent large study showed that it affects young men the most. About 7% of people w dsps are teens. Of people w sleep -wake schedule disorders – it makes up about 40%.

Answered 12/29/2013

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