Table I.
Sample Characteristics
| CRF Study (n = 13) | TRACTS (n = 115) | |
|---|---|---|
| n (%) | n (%) | |
| Gender (male) | 13 (100) | 101 (87.8) |
| Race (White) | 9 (69.2) | 86 (74.8) |
| Military branch | ||
| Army | 4 (30.8) | 29 (25.2) |
| Navy | 1 (7.7) | 4 (3.5) |
| Marines | 2 (15.4) | 21 (18.3) |
| Air Force | 0 (0) | 2 (1.7) |
| National Guard/Reserves | 6 (46.2) | 58 (50.4) |
| Current smoker | 4 (30.8) | 31 (27.0) |
| Lifetime traumatic brain injury | 9 (69.2) | 86 (74.8) |
| Co-morbid mental disorder | ||
| Mood disorder | 4 (30.8) | 47 (40.9) |
| Anxiety disorder | 1 (7.7) | 35 (30.4) |
| Substance use disorder | 1 (7.7) | 32 (27.8) |
| Mean (SD) | Mean (SD) | |
| Age | 35.3 (8.1) | 35.0 (9.6) |
| Body mass index | 28.7 (3.5) | 29.1 (4.7) |
| Waist-hip ratio | 0.92 (0.06) | 0.90 (0.08) |
| Total cholesterol | 191.8 (30.2) | 188.6 (37.8) |
| High-density lipoproteins | 43.0 (7.1) | 48.7 (14.4) |
| Low-density lipoproteins | 121.7 (28.2) | 117.6 (33.2) |
| Triglycerides | 148.5 (79.5) | 144.0 (107.4) |
| HbA1c | 5.5 (0.25) | 5.5 (0.31) |
| Resting heart rate | 78.6 (11.3) | NA |
| Resting systolic blood pressure | 115.7 (12.8) | 121.0 (13.9) |
| Resting diastolic blood pressure | 79.8 (8.1) | 77.8 (10.1) |
 O2peak (mL/kg/min) |
37.7 (6.7) | NA |
| VT (mL/kg/min) | 27.7 (6.5) | NA |
| CAPS total score | 62.8 (18.5) | 70.0 (10.1) |
| Re-experiencing | 15.2 (6.3) | 18.4 (7.5) |
| Avoidance/numbing | 25.5 (9.5) | 27.8 (9.6) |
| Hyperarousal | 22.0 (6.8) | 23.8 (6.7) |
NA = not available