Predicting Treatment Response Using Psychophysiologic Reactivity Measures

Study Overview
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Brief Summary
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Objective psychophysiologic reactivity data may be useful for predicting post-traumatic stress disorder (PTSD) treatment response. Given the variety of PTSD treatments and the lack of a clearly superior treatment, a reliable and valid approach to predicting treatment response is needed. Specific Aims: 1). Evaluate the clinical utility of psychophysiologic reactivity measures to predict overall PTSD symptom response among OEF/OIF/OND (Operation Enduring Freedom/Operation Iraqi Freedom/Operation New Dawn) veterans receiving treatment for PTSD. 2). Evaluate the clinical utility of psychophysiologic reactivity measures to predict psychosocial functioning and health-related quality of life (HRQoL) response among OEF/OIF/OND veterans in treatment for PTSD. Exploratory). Develop psychophysiologic, neuropsychological, and/or self-report models to predict PTSD symptom response to pharmacotherapy, psychotherapy, and combined pharmacotherapy/psychotherapy. The investigators will divide psychophysiologic reactivity predictors into two groups: heart rate variability and attentional bias (eye gaze tracking and modified Stroop). The investigators will collect observational and longitudinal data from a treatment-seeking sample of 50 OEF/OIF/OND veterans with PTSD recruited from the Central Arkansas Veterans Healthcare System (CAVHS) Mental Health Clinics.

Detailed Description
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All subjects will complete a baseline assessment including self-report data and psychophysiologic reactivity measures. Trained research assistants will collect psychophysiologic reactivity data. The investigators will collect the 3-month data in-person. At 6-months, self-report data will be collected in-person. If study participant is unable to complete the 6-month assessment in person the investigators will attempt to collect the self-report data by phone. The study instruments have all been previously administered by telephone. The project coordinator will schedule and track the participants using the telephone. The project coordinator will call participants to remind them about follow-up appointments. The consent form will also include the name and phone number of at least one contact person. Psychophysiologic reactivity measures will be collected first to minimize fatigue. In addition, the psychophysiologic reactivity measures are context dependent and the investigators do not want the psychophysiologic measures to be primed by symptom reporting. Heart rate variability data will be collected at baseline for five minutes prior to other testing and then continued during eye gaze tracking and modified Stroop testing.

Official Title
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Predicting Treatment Response Using Psychophysiologic Reactivity Measures

Conditions
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Post Traumatic Stress Disorder

Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: OEF/OIF/OND Veterans Ages 18 to 60 (The investigators chose to limit the recruitment age to 60 because heart rate variability decreases dramatically with age and therefore may not demonstrate the variability necessary for use in a prediction model.) Currently in or about to start treatment for deployment-related PTSD at Mental Health Clinics PTSD symptom severity score using the PTSD Checklist-Civilian version of 40 or greater Able to provide the name and phone number of at least one contact person in case of difficulty locating participant for the follow-up assessment. Exclusion Criteria: Current diagnosis of schizophrenia Daily use of benzodiazepines except as needed for sleep, Daily use of beta-blockers Plans to leave the area within 6 months.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 60 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Veterans with PTSD<br>Operation Enduring Freedom/Operation Iraqi Freedom/Operation New Dawn (OEF/OIF/OND) veterans who are ages 18 to 60 and currently in or about to start treatment for deployment-related Post-Traumatic Stress Disorder (PTSD) at the Central Arkansas Veterans Healthcare System Mental Health Clinics. | |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Change in Eye-gaze Tracking | This measures attentional bias. | from Baseline to 6 months | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Change in Modified Stroop | This measures attentional bias | from Baseline to 6 months | 
| Change in Heart rate variability |  | from Baseline to 6 months | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Heart rate variability, Attentional Bias