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Predictors of Risk and Resilience for Posttraumatic Stress Disorder Among Ground Combat Marines: Methods of the Marine Resiliency Study

The figure shows 3 sources of data: archival data, direct assessments, and ancillary studies. Archival data are from the Career History Archival Medical and Personnel System (CHAMPS) database. The 5 components of archival data are 1) medical diagnosis, 2) hospitalizations, 3) outpatient health care visits, 4) duty status, and 5) separation data and reason. Direct assessments are of 5 types, some of which have subcomponents, listed in parentheses: 1) historical (self-report questionnaires), 2) biological (blood, urine, and saliva; pulse and blood pressure; body dimensions; physiological reactivity), 3) neuropsychological (neurocognitive performance), 4) psychiatric and medical (clinical interviews and self-report questionnaires), and 5) psychosocial (self-report questionnaires). Ancillary studies are of 2 types: genetics (genome-wide association study) and genomics (gene expression study).

Figure 1. Data sources available to the Marine Resiliency Study.

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This figure depicts the number of Marines who attended the initial study briefing (n = 2,978) and the number of Marines still participating, the number who withdrew and declined future participation, and the number who were contacted and unavailable for follow-up visit. A total of 2,610 Marines who heard the briefing consented (87.6%) and were assessed; 17 of these Marines subsequently withdrew and declined participation. At T1 2,593 Marines completed the predeployment assessment; of these, 67 withdrew and declined future participation, and 295 were contacted and unavailable for follow-up visits. At T2, the 1-week postdeployment assessment, 2,231 (86.0%) Marines were assessed, of whom 25 withdrew and declined future participation; 603 were contacted and unavailable for follow-up visits. At T3, the 3-month postdeployment assessment, 1,898 (73.2%) Marines were participating; 19 withdrew and declined future participation; 453 were contacted and unavailable for follow-up visits. At T4, the 6-month postdeployment assessment, 1,609 (62.1%) Marines were participating, and 420 Marines from battalion 4 were awaiting data collection.

Figure 2. Subject recruitment and retention for the Marine Resiliency Study (N = 2,610) through September 2011.

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