Sample Description Study Type Study Design Time Frame
Phase 1: All OIF/OEF Veteran Service Members since October 2001 Observational

•  Primary Purpose: Observational

2007 Start
Gender: Both
Group: Adult
Phase II: TBI :
N = 1,600
Tra Lima Controls:
N = 800
Healthy Controls:
N = 800
Gender: Both
Group: Adult
Phase III:
Focus Groups:
N = 60
Cognitive Interviews:
N = 60
Longitudinal Online
Questionnaire:
N = 300
Gender: Both
Group: Adult
N=103 Observational

•  Observational Model: Cohort



•  Time Perspective: Prospective

October 2002-
Octobcr2008
Gender: Both
Group: Adult/Senior


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