Table 2 Primary analyses

	Control		Treatment		Residual standard deviation	Diff. Means (95% CI)	p Value
	N	Adjusted mean	N	Adjusted mean	Residual standard deviation	Diff. Means (95% CI)	p Value
Post-traumatic symptom composite	166*	46.0	146	52.6	23.9	6.6 (1.2, 12.0)	0.016
General health composite	166*	49.0	145	50.5	16.4	1.5 (−2.2, 5.2)	0.417

*Does not include one subject who was followed for outcome, whose form was misplaced prior to data entry.
Statistical analysis by regression, adjusting for age-group, gender, race, other-systems injuries and Glasgow Coma Scale (GCS).
Adjusted means calculated for a white male under the age of 40 years with other-systems injuries and GCS = 15.