TABLE 4.

Stratified Hospital Category Probability of Any PDI Event by Patient-Discharge Characteristics (aOR, 95% Confidence Interval)

Covariates	Reference	Category	Stratified Hospital Category Model
			Non–Safety-Net			Safety-Net			Children’s Hospital
			aOR	95% CI		aOR	95% CI		aOR	95% CI
Age, y	13–17	<1	0.94	0.63	1.41	1.01	0.79	1.30	1.04	0.70	1.54
		1–2	0.72	0.43	1.21	1.07	0.82	1.41	1.12	0.81	1.53
		3–5	1.71	1.08	2.72	0.97	0.66	1.41	0.92	0.71	1.18
		6–12	0.98	0.55	1.76	1.04	0.82	1.31	0.89	0.73	1.09
Gender	Female	Male	1.15	0.79	1.66	1.06	0.89	1.27	0.91	0.79	1.06
Race/ethnicity	White	Black	0.60	0.22	1.63	0.99	0.67	1.47	0.65	0.25	1.74
		Hispanic	0.46	0.22	0.93	0.90	0.73	1.13	1.04	0.62	1.75
		Other/missinga	1.17	0.64	2.13	0.74	0.57	0.96	1.10	0.66	1.83
Insurance payer	Private	Medicaid	0.95	0.74	1.22	0.91	0.73	1.13	1.02	0.82	1.29
		Uninsured	2.21	1.15	4.24	0.86	0.55	1.35	0.86	0.37	1.99
		Other	1.73	0.81	3.67	1.02	0.73	1.44	0.99	0.59	1.66
Severityb	Low	High	13.43	9.83	18.34	15.11	11.96	19.08	16.08	10.27	25.16
No. of chronic conditionsc	0	1	1.84	0.95	3.58	2.02	1.56	2.64	1.17	0.60	2.26
		2 or more	2.48	1.26	4.87	3.84	2.86	5.15	2.64	1.54	4.50
			c = 0.81			c = 0.84			c = 0.85

CI, confidence interval. Source: Healthcare Cost and Utilization Project 2009 National Inpatient Sample.

^aMissing race/ethnicity values are also contained in this category.

^bLow, APRDRG_Severity rating of 1 (minor loss of function, includes cases with no comorbidity or complications) or 2 (moderate loss of function); High, APRDRG_Severity rating of 3 (major loss of function) or 4 (extreme loss of function).

^cThe weighted (to national level) means for the number of chronic conditions by hospital category are as follows: Non–Safety-Net = 1.06; Safety Net = 1.08; and Children’s =1.58.