Related Variables

	visitaa	visit date	Ankle-Arm Index
	visitbr	Date of visit	Brachial Reactivity
	visitdat	Date of visit	Demographics
	visitecg	Date of visit	Electrocardiography
	whenpsg	When subject had previous sleep study	Lab Visit
	stdatep	PSG Start Date	Polysomnography/Administrative
	q10q3	Child's date of birth	Questionnaires/CHQ
	q11q2	Your date of birth	Questionnaires/CHQ
	q11q8	What is today's date?	Questionnaires/CHQ
	visitld	Date of Lab Study from Diary	Sleep Diary