17.3 Prior to the Visit

One to two days prior to the visit, call the participant to confirm. Ask about usual bedtime. Request the participant:

To shower or bathe less than 24 hours of their arrival.
To shampoo and refrain from using hairsprays, gels, mousse, and/or oils in the hair.
Men should be asked to shave before the visit.
To be dressed in a t-shirt, tank top, or 2-piece bed clothes. Encourage the participant to avoid wearing a long nightgown, nightshirt or one-piece garment that would need to be lifted above the waist.

Explain that this is not an issue of cleanliness, but that the special procedures require the skin to be as free from oils as possible.

National Sleep Research Resource

Cleveland Family Study