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Table 1 Age-Standardizeda Baseline Characteristics (%) By History of PTSD, 2001–2015

From: Posttraumatic stress disorder and risk of selected autoimmune diseases among US military personnel

CharacteristicAll service members (N = 120,572)Men (N = 85,460)Women (N = 35,112)
No PTSD (n = 110,697)PTSD (n = 9875)No PTSD (n = 78,861)PTSD (n = 6599)No PTSD (n = 31,836)PTSD (n = 3276)
Age, yearsb27.6 (6.3)26.2 (5.3)28.1 (6.4)26.5 (5.2)26.4 (5.8)25.7 (5.4)
Enrollment panel
 2001–2003321834182618
 2004–2006171815172221
 2007–2009262825273132
 2011–2013253626382230
Race/ethnicity
 White, non-Hispanic716975736262
 Black, non-Hispanic131210102018
 Other161915181820
Officer rank197197198
Service branch
 Army345334553449
 Navy/Coast Guard222022182424
 Marine Corps1013131656
 Air Force341432123821
Other mental health conditionc8675631374
Smoking status
 Never604258396649
 Past212622261925
 Current193221351527
Heavy or problem drinking173418381528
Body mass indexd
 < 25464138346455
 25–29464653513036
 ≥ 30814916610
Prior combat experience214624531533
Prior physical or sexual trauma10316201953
  1. aValues are standardized to the age distribution of the study population at the start of follow-up
  2. bValues are expressed as mean (standard deviation)
  3. cParticipants were classified as having a history of another mental health condition if they self-reported a diagnosis of depression, schizophrenia, or bipolar disorder or if they screened positive for major depression, panic disorder, or other anxiety disorders
  4. dWeight (kg)/height (m)2