Table 1 Demographics and clinical information for seabees subjects from the 24th Reserve Naval Mobile Construction (Seabees) Battalion. *Of the controls, 9 were deployed and 7 were non-deployed, all from the same seabees battalion. † P values for age and education were obtained from an F-test with 3 df, and those for the rest, from Fisher’s exact test for a 4 × 2 table. ‡ no information was provided by one deployed control subject.
Characteristic | Controls* | Syndrome 1 | Syndrome 2 | Syndrome 3 | P value† |
|---|---|---|---|---|---|
N of subjects | 16 | 11 | 17 | 11 | |
Mean age, years (SD) | 60.4 (6.8) | 51.2 (6.1) | 62.7 (6.7) | 57.3 (6.5) | 0.0003 |
Mean years of education (SD) | 13 (2) | 14 (1) | 12 (3) | 12 (1) | 0.09 |
Alcohol abuse or dependence (%) | 4/15 (27)‡ | 4/11 (36) | 6/17 (35) | 5/11 (45) | 0.80 |
Drug abuse or dependence (%) | 2/16 (13) | 1/11 (9) | 1/17 (6) | 2/11 (18) | 0.80 |
Major depressive disorder (%) | 0/15 (0)‡ | 2/11 (18) | 3/17 (18) | 0/11 (0) | 0.16 |
Post-traumatic stress disorder (%) | 0/16 (0) | 2/11 (18) | 5/17 (29) | 2/11 (18) | 0.11 |
