TABLE 2.

Admission Rate Variation Across US Children’s Hospitals for Select APR-DRG Diagnostic Groups Among Pediatric Patients Treated in the ED From 2009 Through 2012 (n = 1 288 706)^a

APR-DRG Category	No. Cases	Hospital-Level Admission Rate			Adjusted Hospital-Level Admission Rateb
		Median (IQR)	Range	Coefficient of Variationc	Median (IQR)	Range	Coefficient of Variationc
Asthma	410 530	24 (15–26)	13–50	0.40	24 (19–29)	13–52	0.32
Cellulitis and other bacterial skin infections	225 304	19 (14–22)	10–41	0.38	18 (14–22)	5–37	0.38
Bronchiolitis and RSV pneumonia	212 574	30 (26–37)	17–77	0.36	32 (27–39)	19–65	0.31
Pneumonia NEC	152 417	29 (25–37)	15–74	0.40	31 (24–35)	19–69	0.31
Kidney and urinary tract infections	120 997	18 (12–21)	5–48	0.54	16 (13–20)	6–37	0.39
Seizure	97 829	17 (12–23)	7–38	0.41	16 (12–23)	7–37	0.39
Concussiond	69 055	17 (12–29)	4–73	0.68	19 (13–28)	5–72	0.64

IQR, interquartile range.

^aPatients aged 0–18 y, inclusive, without a complex chronic condition diagnosis.

^bAdjusted for patient severity.

^cCoefficient of variation (SD/mean) represents a standardized metric to compare the variability between measurements with different means, with higher values indicating greater variation.

^dConcussion, closed skull fracture, uncomplicated intracranial injury, coma <1 h, or no coma.