Table 1.

Demographics and injury characteristics of all subjects included in longitudinal analyses.

	OI (n=64)			TBI (n=71)
	Mean	SD	Range	Mean	SD	Range	p-value
Age at injury (yrs)	11.89	2.5	7.05–17.21	13.38	2.81	7.10–16.55	0.0016
SCI (z-score)	0.103	0.83	−1.52–1.89	−0.0	0.82	−1.86–1.75	0.4756
GCS	15	0	15–15	7.94	4.5	3–15
Gender	18 female; 46 male			25 female; 46 male			0.3775
AIS score	6.38	3.82	1–22	23.89	10.19	9–50	<0.0001
Pre injury ADHD	n=20 (31.75%)			n=13 (19.4%)			0.1061
Race/Ethnicity	22 AA; 20 Caucasian/Asian; 22 Hispanic			9AA; 31 Caucasian/Asian; 30 Hispanic			0.0105
Mechanism of Injury	* High Speed=11; Low Speed=53			* High Speed=50; Low Speed=21			<0.001

^*TBI = Traumatic Brain Injury, OI = Orthopedic Injury, GCS = Glasgow Coma Scale, SCI = Socioeconomic Composite Index, AIS = Abbreviated Injury Scale