Table 1:

Demographics of patients with mTBI and MR imaging findings suggestive of axonal injury (AI)

No.	Age/Sex	Injury	Elapsed Time^*	PBV^†	PGM^†	PWM^†	WBNAA (mmol/L)	MRI Findings
1	19/F	MVA	3.8 years	93.3	56.0	37.4	10.7	Normal
2	21/M	Assault	1.2 years	91.8	58.5	33.2	13.1	Punctate AI foci
3	22/M	MVA	1 year	94.4	60.0	34.4	13.1	Normal
4	25/M	Assault	2.4 months	94.8	56.8	37.9	12.1	Punctate AI foci
5	25/F	MVA	8 days	92.0	57.3	34.7	14.6	Normal
6	28/M	Assault	1.2 months	90.1	58.2	31.9	11.5	Normal
7	30/F	Assault	7 months	92.8	56.5	36.3	14.8	Normal
8	30/M	MVA	3 years	78.0	45.1	32.9	12.5	Old contusion, volume loss, AI foci
9	31/F	Fall	1 day	93.6	52.2	41.3	6.2	Normal
10	35/F	BA	3 days	84.7	54.8	29.9	10.5	Normal
11	35/F	MVA	31.5 years	86.1	55.3	30.8	10.4	Old contusion, AI foci
12	36/F	Assault	9 days	89.7	50.2	39.5	13.2	Normal
13	37/M	BA	3 days	89.6	59.2	30.4	15.0	Normal
14	39/M	MVA	6.3 months	89.4	51.0	38.3	9.5	Normal
15	41/M	Other^†	2 days	89.8	51.0	38.8	9.1	Normal
16	43/M	MVA	4.3 years	91.6	53.6	37.9	11.9	Normal
17	47/M	Fall	7.9 years	83.0	48.5	34.4	9.6	AI focus
18	47/F	MVA	1.7 years	90.3	51.3	39.0	9.2	Normal
19	49/F	Fall	4.6 years	79.6	49.6	30.0	14.0	Normal
20	57/M	Fall	9 days	91.8	57.4	34.4	6.1	Right frontal hemorrhage
Avg ± SD	35 ± 10			89.3 ± 4.7	54.1 ± 4.1	35.2 ± 3.5	11.3 ± 2.6

Note:—mTBI indicates mild traumatic brain injury; PBV, percentage brain volume; PGM, percentage gray matter; PWM, percentage white matter; WBNAA, whole-brain N-acetylaspartate; MVA, motor vehicle crash; BA, bicycle accident. All patients had a GCS score of 15.
* Time from injury to examination.
† Injury involving a power tool.