Related Variables

	longnaps	On average, how long are your naps?	Lab Visit
	nonaps	If yes, how often have you had to take daytime naps of 5 minutes or longer?	Lab Visit
	tothrslp	How many total hours of actual sleep do you get in a 24-hour period (including naps)	Lab Visit
	napdy	Have you taken any naps today?	Sleep Diary