Table 5

Regression model of cost of inpatient youth injured in sport

		Parameter estimate	P value	Percentage change to cost (%)
Patient factors	Elementary school*	−0.320	<0.0001	−27.4
	Middle school*	−0.218	<0.0001	−19.6
	Female*	−0.105	<0.0001	−10.0
	Black	0.046	0.2644
	Other race	−0.000	0.9945
	Hispanic	0.030	0.4760
	Uninsured	0.025	0.7049
	Medicaid	0.047	0.1605
	Full contact sports	0.003	0.9352
	Non-contact sports*	0.457	0.0030	57.9
	Elective admission*	0.261	<0.0001	29.8
	Urgent admission	−0.113	0.0850
	Trauma admission*	0.347	<0.0001	41.5
	ICISS*	−0.038	<0.0001	−3.7
Nature of injury	Fractures of the skull, neck or trunk	−0.048	0.6197
	Other fractures*	0.309	0.0004	36.2
	Internal injury*	−0.526	<0.0001	−40.9
	Dislocation	−0.086	0.5254
	Open wound	0.105	0.4708
	Other injury	−0.203	0.1435
Hospital factors	Rural hospital	0.338	0.2551
	Teaching hospital*	0.067	0.0685
	For profit hospital	−0.026	0.5343
	Government hospital*	0.122	0.0221	13.0

The values in bold indicate statistical significance at the α = 0.05 level.
*Statistically significant at the α=0.05 level.
ICD-9, International Classification of Diseases, Ninth Revision; ICISS, ICD-9 Injury Severity Score.