TABLE 1.

CRG Cohorts Representing Healthy Children, Children With NC-CDs, and Children With C-CDs as Grouped by Their Illness Severity and Chronicity

WO-CD	NC-CD	C-CD
CRG 1: healthy	CRG 3: single minor chronic disease	CRG 6: significant chronic disease in 2 organ systems
CRG 2: significant acute illness	CRG 4: minor chronic disease in multiple organ systems	CRG 7: dominant chronic disease in ≥3 organ systems
	CRG 5: episodic and lifelong chronic conditions	CRG 8: hematologic or oncologic malignancy
		CRG 9: catastrophic conditions
Examples:	Examples:	Examples:
Well-child examination	Asthma	Asthma and epilepsy
Upper respiratory tract infection	Attention-deficit/hyperactivity disorder	Severe neurologic injury
Otitis media	Diabetes mellitus	Cystic fibrosis
Bronchiolitis	Depression