DoD PTSD November 13 - Information Processing Modification in the Treatment of PTSD
Recruitment status was Not yet recruiting
The purpose of this study is to determine whether a computerized intervention designed to change the nature of attention biases will be effective in reducing the symptoms of post traumatic stress disorder (PTSD) in American combat veterans returning from the wars in Afghanistan and Iraq.
|Study Design:||Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double Blind (Subject, Outcomes Assessor)
Primary Purpose: Treatment
|Official Title:||Information Processing Modification in the Treatment of PTSD|
- Clinician-Administered PTSD Scale for DSM-IV [ Time Frame: Pre, Post, Followup ] [ Designated as safety issue: No ]
- Mississippi Scale for Combat Related PTSD (M-PTSD) [ Time Frame: Pre, Post, Followup, Every Other Session ] [ Designated as safety issue: No ]
|Study Start Date:||November 2008|
|Estimated Primary Completion Date:||November 2013 (Final data collection date for primary outcome measure)|
Behavioral: Attention Modification Program
The AMP protocol includes twelve 30-min sessions delivered over a 6-week period. During each session, participants will see 240 trials consisting of the various combinations of probe type (E or F), probe position (top or bottom), and word type (Neutral or Trauma). Of the 240 trials, 48 include only neutral words: 2 (probe type) X 2 (probe position) X 12 (word pairs). The remaining 192 trials include one neutral word and one trauma word: 2 (probe type) X 2 (probe position) X 2 (repetitions) X 24 (word pairs). On trials where participants see one neutral word and one trauma word (i.e., 80% of the trials), the probe always follows the neutral word.
|Placebo Comparator: 2||
Behavioral: Attention Modification Program
The placebo condition (PC) will be identical to the AMP condition except that during the presentation of the trials where a threat word is present, the probe will appear with equal frequency in the position of threat and neutral words. Thus, neither threat nor neutral words have signal value with regard to the position of the probe.
Thirty percent of returning veterans present with mental health problems with Posttraumatic stress disorder (PTSD) as the most common problem in this group (52% of overall diagnoses). This translates into PTSD prevalence rates of 12% in Afghani veterans and 19% for Iraqi veterans, rates that are two to three times higher than the overall lifetime prevalence rate in the general population (8%). Moreover, 70% have not received any mental health services. Thus the majority are not receiving any help. Those with PTSD are likely to experience problems across several life domains including higher rates of divorce, problems raising children, and engaging in domestic violence. They are also more likely to suffer from other mental health problems including depression, substance abuse, and generalized anxiety disorder. Forty four percent of individuals with PTSD do not respond to psychosocial and pharmacological treatments. Thus, there is a clear need to develop highly effective and efficient treatments for PTSD. Researchers have established a relationship between PTSD and difficulty disengaging attention from threat relevant information. This knowledge; however, has not been translated into more effective treatments for this disorder. This five-year proposal aims to test a computerized treatment for PTSD in a double-blind, placebo-controlled study that would bridge research on attention bias and treatment development. Those in the active condition will receive a computer-delivered attention modification program (AMP) designed to enhance attention disengagement from threatening stimuli. The AMP protocol includes six weeks of biweekly sessions in which participants see 240 trials consisting of the various combinations of probe type (E or F), probe position (top or bottom), and word type (Neutral or Trauma). Of the 240 trials, 48 include only neutral words: 2 (probe type) X 2 (probe position) X 12 (word pairs). The remaining 192 trials include one neutral word and one trauma word: 2 (probe type) X 2 (probe position) X 2 (repetitions) X 24 (word pairs). On trials where participants see one neutral word and one trauma word (i.e., 80% of the trials), the probe always follows the neutral word. Thus, although there is no specific instruction to direct attention away from threat word, on 80% of the trials the position of the threat word indicates the position of the probe (i.e., in the location opposite the threat word). The placebo condition (PC) will be identical to the AMP condition except that during the presentation of threat/neutral word pairs, the probe will appear with equal frequency in the position of threat and neutral words. Thus, neither threat nor neutral words have signal value. We have used this intervention to successfully establish a pattern of enhanced attention disengagement to threat words in 3 studies. We present the results from 3 clinical trials demonstrating the efficacy of attention modification programs (AMP) in ameliorating symptoms of anxiety. Specifically, we report results from studies of individuals with generalized social phobia (GSP; n=53) and generalized anxiety disorder (GAD; n=24) demonstrating the effectiveness of the procedures described in this proposal. In brief, our intervention was effective in: a) changing biased attention, b) reducing clinical symptoms of anxiety, c) maintaining its effects in up to one year follow-up. This efficient and efficacious technique for changing attention bias in anxiety can provide a low cost, easy to administer treatment that is grounded in basic cognitive science that may help reduce suffering in individuals with anxiety. The goal of the current proposal is to extend these findings to the highly related disorder of PTSD, and to examine the generalizability of the results to individuals with comorbid conditions. In the current proposal we will test two hypotheses: 1) Individuals with PTSD completing the AMP will show a larger reduction in their attention bias to threat compared to the placebo group, 2) Individuals with PTSD completing AMP will show a larger reduction in anxiety symptoms compared to the placebo group.
|Contact: Nader Amir, PhD||619 email@example.com|
|United States, California|
|Center for Understanding and Treating Anxiety||Not yet recruiting|
|San Diego, California, United States, 92120|
|Principal Investigator:||Nader Amir, PhD||San Diego State University|