Of the more than 3,100 respondents who completed the online survey in February, 59 percent reported either feeling no improvement or worse after undergoing TBI and PTSD treatment. And 30 percent said they had terminated their treatment plan before completion.

The results of the survey were shared during the June 24 American Legion symposium "Advancing Care and Treatments for Veterans with TBI and PTSD" at the Institute of Medicine in Washington, D.C. Public- and private-sector experts shared information during the day-long event – including information from the Legion's survey that was conducted with Data Recognition Corporation.

Dr. Jeffrey Greenberg of Data Recognition presented the results of the survey. He said that of the respondents who terminated their treatment plans early, 20 percent did so because of a side effect associated with the treatment. Approximately 20 percent ended their treatments because of dissatisfaction with their provider.