People who sleep nude are more likely to identify as night owls, according to new survey.

A new study of 2,000 Americans examined their sleeping habits and personalities in relation to whether they prefer to sleep in the buff or wear pajamas (1,000 respondents in each preference).

Nude sleepers were more likely to call themselves night owls (38 percent), whereas pajama-wearers identified as a mixture between an early bird and night-owl (34 percent).

And it turns out, self-confidence may not be that closely related to your choice of sleep attire. Conducted by OnePoll on behalf of Mattress Advisor, the survey found pajama-wearers ranked their self-confidence as a six out 10, in comparison to only a five out of 10 from those who sleep in the buff. This could also relate to sleeping nudists identifying as introverts (45 percent) and pajama-wearers calling themselves ambiverts (47 percent).

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