Table 1.

Characterization of the participants included in this study, including head trauma history, as assessed by the BAT-L, and other relevant clinical and psychiatric variables assessed near the time of their PET scan or during their participant in the TRACTS study. The visit where the assessment was collected is indicated in the table.

Traumatic brain injury/Head trauma	Mean ± St.Dev. (Range)	% Endorsed
Number of Moderate/Severe TBI	0.06 ± 0.24 (0–1)	5.88%
Number of Military Blunt TBI	0.59 ± 0.79 (0–2)	41.18%
Number of Civilian Blunt TBI	0.71 ± 0.91 (0–3)	47.06%
Number of Military Blast TBI	0.53 ± 0.62 (0–2)	47.06%
Number of Blast Exposures within 0–10 m	3.47 ± 8.35 (0−30)	41.18%
Number of Blast Exposures within 11–25 m	3.76 ± 12.27 (0–51)	29.41%
Number of Blast Exposures within 26–100 m	56.53 ± 153.60 (0–501)	70.59%
PTA combined time (minutes)	735 ± 2430 (0–10,020)	58.82%
AMS combined time (minutes)	861 ± 2431 (0–10,020)	76.47%
LOC combined time (minutes)	1 ± 1.96 (0–7)	29.41%
BAT-L Lifetime TBI Total Score	3.24 ± 2.56 (0–9)	–

Behavioral/Psychiatric	Mean ± St.Dev. (Range)	% Diagnosed
CAPS Score (TRACTS Visit)	40.47 ± 27.90 (7–93)	47.06%
PCL (Within 30 days of PET scan)	35.35 ± 13.81 (17–65)	–
DASS/SCID Depression/Mood (TRACTS Visit)	9.13 ± 10.30 (0–28)	29.41%
DASS/SCID Anxiety (TRACTS Visit)	4.25 ± 4.72 (0–14)	5.88%
DASS Stress (TRACTS Visit)	12.13 ± 7.67 (0–28)
SCID Substance Use Disorder (TRACTS Visit)⁎	–	0%
Lifetime Drinking History (TRACTS Visit)	1227 ± 1258 (64–3947)	–
DRRI Combat Score (TRACTS Visit)	16.73 ± 11.73 (2–46)	–

^⁎Note: Many participants in the PET study were interested in completing other study-associated procedures that required a drug screen. Participants were informed of the drug screen prior to enrollment, and so participants from the TRACTS study with Substance Use Disorder were less likely to enroll.