Related Variables

	event	Event type	Clinical Data/Incident Outcomes/Cardiovascular Diseases
	cai4pa	Central Apnea Index >= 4% - number of [central apneas with >= 4% oxygen desaturation or arousal] per hour of sleep	Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
	rdi4pa	Overall Respiratory Disturbance Index (RDI) at >=4% oxygen desaturation or arousal	Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices