Paired pre– and post–t-test analysis showed these differences to be significant (t = 5.99, df = 19, p < .001), with
16 of the 20 completers no longer meeting the PCL-M criteria for PTSD after treatment and an average 50 percent
decrease in symptoms among all completers.
Beck Anxiety Inventory scores significantly decreased (33 percent), and mean Patient Health Questionnaire depression scores decreased even more (49 percent).