Table 2.

Participant characteristics: n, %

	Concept elicitation interviewees n = 28	Cognitive interviewees n = 32	Psychometric sample n = 307
Recruitment location
Primary care	7, 25%	32, 100%	--
Sleep clinic	7, 25%	--	--
Nephrology clinic	14, 50%	--	--
Internet panel	--	--	307, 100%
Child age
8–12 years	15, 54%	16, 50%	169, 55%
13–17 years	13, 46%	16, 50%	138, 45%
Child gender, male	11, 39%	16, 50%	147, 48%
Child race
White/Caucasian	19, 68%	20, 63%	175, 57%
Black/African American	6, 21%	4, 13%	89, 29%
Other	3, 11%	8, 25%	43, 14%
Child ethnicity, Hispanic	1, 4%	1, 3%	15, 5%