Table 3 Demographic characteristics of US military service members diagnosed with nonspecific arthropathy/arthralgia between 1999 and 2007 and their matched controls
Category | Subcategory | Nonspecific Arthralgia/ Arthropathy Cases | Nonspecific Arthralgia/ Arthropathy Controls |
|---|---|---|---|
N | Â | 16,365 | 65,422 |
Age (mean ± SD) |  | 33.4 ± 8.8 | 33.4 ± 8.8 |
Sex a (n; %) | Male | 12,979 (79.3) | 51,895 (79.3) |
| Â | Female | 3,385 (20.7) | 13,523 (20.7) |
Race (n; %) | Asian | 620 (3.8) | 2914 (4.5) |
| Â | Black | 3,687 (22.5) | 12,256 (18.7) |
| Â | Hispanic | 1,445 (8.8) | 6,290 (9.6) |
| Â | Indian | 250 (1.5) | 922 (1.4) |
| Â | White | 9,920 (60.6) | 41,210 (63.0) |
| Â | Other/Unknown | 443 (2.7) | 1,830 (2.8) |
Marital Status (n; %) | Single | 4,407 (26.9) | 20,536 (31.4) |
| Â | Married | 10,904 (66.6) | 41,398 (63.3) |
| Â | Other/Unknown | 1,054 (6.4) | 3488 (5.3) |
Service Branch (n; %) | Air Force | 3,671 (22.4) | 17,089 (26.1) |
| Â | Army | 7,865 (48.1) | 24,628 (37.6) |
| Â | Marine | 1,016 (6.2) | 6,350 (9.7) |
| Â | Navy | 3,813 (23.3) | 17,355 (26.5) |
Rank a(n; %) | Enlisted | 13,782 (84.2) | 50,541 (77.2) |
| Â | Warrant | 312 (1.9) | 1,106 (1.7) |
| Â | Officer | 2,271 (13.9) | 13,775 (21.1) |
Education level (n; %) | High School or equivalent | 10,781 (65.9) | 39,195 (59.9) |
| Â | Some college | 2,023 (12.4) | 7,563 (11.6) |
| Â | Bachelors | 1,835 (11.2) | 9,511 (14.5) |
| Â | Post grad | 1,330 (8.1) | 7,204 (11.0) |
| Â | Unknown | 396 (2.4) | 1,949 (3.0) |
High Risk Deployment b | 6 months | 374 (2.3) | 3,097 (4.7) |
(n; %) | 5 months | 280 (1.7) | 2,571 (3.9) |
| Â | 4 months | 182 (1.1) | 2,077 (3.2) |
| Â | 3 months | 110 (0.7) | 1,568 (2.4) |
Documented Infectious | 6 months | 211 (1.3) | 472 (0.7) |
Gastroenteritis (n; %) | 5 months | 181 (1.1) | 401 (0.6) |
| Â | 4 months | 154 (0.9) | 332 (0.5) |
| Â | 3 months | 123 (0.8) | 256 (0.4) |