33% of Americans wear pajamas to bed, while 22% sleep naked.
Adam Rifkin stashed this in Sleep!
Stashed in: Facts
What are the other 45% wearing to bed?!
I'm guessing they wear clothes.
I think sweat pants, tee shirts, and shorts all count as clothes, not pajamas.
But since I can't find a source for this stat, I'm not convinced the numbers are actually true.