Table 1.

Demographics of All Enrolled Participants

	Survivors		Patients deceased at 3 months		Patients deceased at 24 months
	Mean ± SD	n	Mean ± SD	n	Mean ± SD	n
Agea	35.06 ± 15.11	304	49.22 ± 17.19	255	47.71 ± 17.84	14

	%		%		%
Race
White	91.42	277	92.55	236	93.86	13
Non-white	8.58	26	7.45	19	7.14	1
Sex
Male	80.92	246	76.86	196	85.71	12
Female	19.08	58	23.14	59	14.29	2
GCS at admissiona
3	12.83	39	41.96	107	14.29	2
4	6.58	20	13.33	34	14.29	2
5	6.91	21	12.55	32	7.14	1
6	20.39	62	11.37	29	21.43	3
7	43.75	133	16.47	42	42.86	6
8	9.54	29	4.31	11	0	0
Mechanism of injury
Traffic accident	62.82	191	38.04	97	42.86	6
Fall	14.14	43	43.53	111	21.43	3
Off-road vehicle accident	06.25	19	2.75	7	7.14	1
Pedestrian struck	06.25	19	7.06	18	14.29	2
Other	04.28	13	4.31	11	7.14	1
Assault	03.95	12	2.35	6	7.14	1
Bicycle	02.30	7	1.96	5	0	0

Among all survivors between 3 and 24 months, mean age was 35 years with 81% being male and 91% white. Mechanism of injury is listed showing that 63% of severe TBIs were attributed to traffic accidents. The most common initial Glasgow Coma Scale (GCS) score on admission was 7. In addition, descriptors for the patients who died before 3 months are shown. Mean age for this population was 49 years with 77% being male and 93% white. The most common mechanism of injury among these patients was falls (44%). Forty-two percent of patients in this population had an initial GCS of 3 on admission.

^aSurvivors were, on average, younger (p < 0.0001). Patients who died in the first 3 months had a higher rate of GCS 3.

SD, standard deviation.