The PDB Show: EP 117 Mental Health Monday; Veteran Mental Health Rates. According to the RAND Center for Military Health Policy Research 20 percent of the vets who served in either Iraq or Afghanistan suffer from either major depression or post-traumatic stress disorder. 19.5 percent of vets in these two categories have experienced a traumatic brain injury. These three service-related disorders alone have an enormous impact on the demand for veteran mental health treatment. There are a number of troubling statistics which show that enough is not being done and that many of our veterans are not receiving the care that they deserve in this area.