Related Variables

	pefppk	Percent of Knudson predictor: PEF (including race correlation)	Clinical Data/Diagnostic Studies/Lung Function/Spirometry
	pkpef	Standardized Knudson predictor: PEF	Clinical Data/Diagnostic Studies/Lung Function/Spirometry
	function	During which time of day do you function best?	Sleep Questionnaires/Chronotype