Table 1

Subject characteristics

	Age	Years of education	Est. IQ*	WAIS-R Vocab.†	WMS-R Verbal Mem. Index‡	Six hour GCS§	PTA (days)¶	Coma length (hr)**	ISS††	TSI‡‡	PET performance§§
As determined by the North American Adult Reading Test - Revised³³. †Standard scores from Wechsler Adult Intelligence Scale - Revised³⁴. ‡From Wechsler Memory Scale - Revised³⁵. §Glasgow Coma Scale³². ¶As determined by two consecutive days of GOAT scores greater than or equal to 75³⁶. *Number of hours with GCS <8. ††Injury Severity Score³⁷. ‡‡Years from the date of injury to the date of testing. §§Proportion of word pairs correctly recalled during PET study.
TBI patients
1	41	10	109	13	123	7.5	21	24	22	4.4	0.91
2	24	13	93	11	99	12	2	3	43	4.1	0.80
3	29	17	104	11	111	3	23	48	29	3.9	0.75
4	23	12	105	12	107	11	23	32	43	3.9	0.36
5	28	16	108	12	95	8.5	28	72	26	4.3	0.52
6	30	13	91	7	89	10	16	120	38	4.6	0.27
M	29	13.5	102	11.0	104	8.67	18.8	49.8	33.5	4.20	0.60
SD	5.9	2.4	7.0	1.9	11.2	2.9	8.3	37.9	8.3	0.3	0.23

Healthy controls (n=11)
M	26	17.8	NA	NA	NA	NA	NA	NA		NA	0.83
SD	4	2.5	NA	NA	NA	NA	NA	NA		NA	0.10