Table 2 Demographic characteristics of study participantsa
|  | Overall (n = 2,537) | EI (n = 1,465) | TBI (n = 1,072) |
|---|---|---|---|
Age at first survey (years) | |||
 18–24 | 7 (0.3) | 1 (0.1) | 6 (0.6) |
 25–29 | 266 (10.5) | 82 (5.6) | 184 (17.2) |
 30–39 | 1491 (58.8) | 850 (58.0) | 641 (59.8) |
 40–49 | 567 (22.3) | 385 (26.3) | 182 (17.0) |
 50 +  | 206 (8.1) | 147 (10.0) | 59 (5.5) |
Sex | |||
 Male | 2392 (94.3) | 1405 (95.9) | 987 (92.1) |
 Female | 145 (5.7) | 60 (4.1) | 85 (7.9) |
Race/ethnicity | |||
 Hispanic or Latino | 288 (11.6) | 158 (11.1) | 130 (12.3) |
 Non-Hispanic, White | 1916 (77.3) | 1106 (77.8) | 810 (76.6) |
 Black or African American | 165 (6.7) | 93 (6.5) | 72 (6.8) |
 Other/unspecified | 111 (4.5) | 65 (4.6) | 46 (4.3) |
Marital status | |||
 Married | 1425 (56.2) | 810 (55.3) | 615 (57.4) |
 Unmarried | 1112 (43.8) | 655 (44.7) | 457 (42.6) |
Military grade | |||
 Enlisted | 2125 (88.1) | 1185 (86.2) | 940 (90.7) |
 Officer | 286 (11.9) | 190 (13.8) | 96 (9.3) |
Service branch | |||
 Air Force | 42 (1.7) | 17 (1.2) | 25 (2.3) |
 Army | 1733 (68.3) | 1037 (70.8) | 696 (64.9) |
 Marine Corps | 686 (27.0) | 363 (24.8) | 323 (30.1) |
 Navy | 76 (3.0) | 48 (3.3) | 28 (2.6) |
Injury mechanism | |||
 Blast | 1928 (76.0) | 991 (67.6) | 937 (87.4) |
 Gunshot wound | 418 (16.5) | 341 (23.3) | 77 (7.2) |
 Other/unknown | 191 (7.5) | 133 (9.0) | 58 (5.5) |
Injury severity score | 4.9 (5.8) | 6.0 (6.6) | 3.5 (4.0) |
Time since injury (years) | 10.4 (3.3) | 11.6 (3.0) | 8.7 (2.9) |
Medical encountersb | |||
 Cardiovascular disorders (%) | 637 (25.1) | 402 (27.4) | 235 (21.9) |
 Musculoskeletal disorders (%) | 1982 (78.1) | 1219 (83.2) | 763 (71.2) |
 PTSD (%) | 839 (33.1) | 457 (31.2) | 382 (35.6) |
Self-reported symptoms | |||
 PCL-5 positive screening (%) | 963 (38.0) | 507 (34.6) | 456 (42.5) |
 PCL-5 score | 27.7 (20.2) | 26.0 (19.7) | 30.1 (20.6) |
Physical component score | 43.8 (10.2) | 43.6 (10.3) | 44.0 (10.0) |
Mental component score | 40.1 (13.5) | 41.1 (13.7) | 38.8 (13.1) |