Table 1.
.Demographic and patient characteristics for n = 339,966 veterans in the study population, fiscal year (FY) 2007
| Characteristic | Total (n = 339,966) |
| Male sex, n (%) | 327,658 (96.4%) |
| Race/ethnicity, n (%) | |
| Non-Hispanic White | 162,053 (47.7%) |
| Black | 77,252 (22.7%) |
| Hispanic | 12,647 (3.7%) |
| Other/unknown | 88,014 (25.9%) |
| Marital status, n (%) | |
| Married | 100,534 (29.6%) |
| Not married | 237,060 (69.7%) |
| Missing | 2,372 (0.7%) |
| Rural/urban residence, n (%) | |
| Urban | 266,987 (78.5%) |
| Rural | 69,072 (20.3%) |
| Missing | 3,907 (1.2%) |
| Co-occurring serious mental illness, n (%) | 142,640 (42.0%) |
| Service connected, n (%) | 120,046 (35.3%) |
| Age, in years, M (SD) | 53.9 (11.0) |
| Charlson comorbidity index, M (SD) | 0.39 (1.14) |