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Table 3 Demographic characteristics of US military service members diagnosed with nonspecific arthropathy/arthralgia between 1999 and 2007 and their matched controls

From: The epidemiology of infectious gastroenteritis related reactive arthritis in U.S. military personnel: a case-control study

Category Subcategory Nonspecific
Arthralgia/
Arthropathy Cases
Nonspecific
Arthralgia/
Arthropathy Controls
N   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)
  Female 3,385 (20.7) 13,523 (20.7)
Race (n; %) Asian 620 (3.8) 2914 (4.5)
  Black 3,687 (22.5) 12,256 (18.7)
  Hispanic 1,445 (8.8) 6,290 (9.6)
  Indian 250 (1.5) 922 (1.4)
  White 9,920 (60.6) 41,210 (63.0)
  Other/Unknown 443 (2.7) 1,830 (2.8)
Marital Status (n; %) Single 4,407 (26.9) 20,536 (31.4)
  Married 10,904 (66.6) 41,398 (63.3)
  Other/Unknown 1,054 (6.4) 3488 (5.3)
Service Branch (n; %) Air Force 3,671 (22.4) 17,089 (26.1)
  Army 7,865 (48.1) 24,628 (37.6)
  Marine 1,016 (6.2) 6,350 (9.7)
  Navy 3,813 (23.3) 17,355 (26.5)
Rank a(n; %) Enlisted 13,782 (84.2) 50,541 (77.2)
  Warrant 312 (1.9) 1,106 (1.7)
  Officer 2,271 (13.9) 13,775 (21.1)
Education level (n; %) High School or equivalent 10,781 (65.9) 39,195 (59.9)
  Some college 2,023 (12.4) 7,563 (11.6)
  Bachelors 1,835 (11.2) 9,511 (14.5)
  Post grad 1,330 (8.1) 7,204 (11.0)
  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)
  4 months 182 (1.1) 2,077 (3.2)
  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)
  4 months 154 (0.9) 332 (0.5)
  3 months 123 (0.8) 256 (0.4)
  1. Backround active duty population rates: 85% male; 69%white/19%black/12%other; 35%Army/26%AirForce/26%Navy/13%Marine
  2. a Missing values: Sex (1 case, 4 controls), Rank (1 control)
  3. b Deployment to a region at high risk for travelers' diarrhea (Iraq, Afghanistan, Persian Gulf or Southwest Asia) within the indicated number of months prior to ReA diagnosis (cases) or censoring (controls)