This study examined the intensity of Posttraumatic Stress Disorder (PTSD) symptoms as measured by the Mississippi Scale, the Keane (PK), and the PTSD (PS) Scales of the MMPI-2 in a sample of 34 African-American and 34 White American Vietnam War Veterans who sought treatment in a Specialized Inpatient PTSD Unit. The scores of the two groups on the Beck Depression Inventory and the clinical scales of the MMPI-2 were also compared. The ethnoculturally different sample was matched on intensity of combat exposure, marital status, employment status, age, and education. No significant differences on the measures of PTSD symptoms were noted and no significant differences were found on the Beck scale or the MMPI-2 clinical scales.

Objective: Cognitive processing therapy is an evidencebased treatment for posttraumatic stress disorder (PTSD); however, questions remain regarding variability in treatment response. Method: A total of 123 veterans participated in group-based cognitive processing therapy (CPT) in residential PTSD treatment. Change over time in PTSD symptoms was modeled as a function of selected demographic and clinical variables. Results: PTSD checklist (PCL) scores decreased by an average of 1 point per session (standard deviation [SD] = 0.1). Initial PCL scores were predicted by the Beck Depression Inventory-II (γ 01 = 0.25; standard error [SE] = 0.08), Insomnia Severity Index (γ 02 = 0.53; SE = 0.15), and Infrequency (F) scale of the Minnesota Multiphasic Personality Inventory-2 (γ 03 = 0.09; SE = 0.04). Rate of change was predicted by the Somatic Complaints (RC1) scale (γ 11 = −0.03; SE = 0.01) and the Antisocial Behavior (RC4) scale (γ 12 = 0.02; SE = 0.01).Conclusions: These results provide insight into characteristics that may influence degree of benefit received from group-based CPT. K E Y W O R D S cognitive processing therapy, posttraumatic stress disorder (PTSD), trauma, treatment outcome, veterans J. Clin. Psychol. 2019;75:364-379. wileyonlinelibrary.com/journal/jclp 364 |

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This study examined the intensity of Posttraumatic Stress Disorder (PTSD) symptoms as measured by the Mississippi Scale, the Keane (PK), and the PTSD (PS) Scales of the MMPI-2 in a sample of 34 African-American and 34 White American Vietnam War Veterans who sought treatment in a Specialized Inpatient PTSD Unit. The scores of the two groups on the Beck Depression Inventory and the clinical scales of the MMPI-2 were also compared. The ethnoculturally different sample was matched on intensity of combat exposure, marital status, employment status, age, and education. No significant differences on the measures of PTSD symptoms were noted and no significant differences were found on the Beck scale or the MMPI-2 clinical scales.