A cluster analysis of symptom patterns and adjustment in Vietnam combat veterans with chronic posttraumatic stress disorder.
This study investigated whether a subgroup of veterans with malignant posttraumatic stress syndrome, as described by Rosenheck (1985) and Lambert et al. (1996), could be identified via cluster analysis within two samples of Vietnam veterans with combat-related posttraumatic stress disorder (PTSD). In the initial subsample (n = 157), four clusters were identified, including a subgroup that scored consistently higher on measures of interpersonal violence and current physical problems. Similar results were found in the cross-validation subsample (n = 156). These results provide support for the theoretical concept of malignant PTSD and suggest that veterans with chronic PTSD are not homogenous. Whereas some manifest extreme levels of both functional impairment and PTSD symptomatology, others exhibit markedly less functional impairment despite manifesting clinically significant levels of PTSD. Clinicians can consider this heterogeneity in their treatment decisions.
Mazzeo
Suzanne E
SE
Virginia Commonwealth University, Richmond 23284, USA. semazzeo@vcu.edu
Beckham
Jean C
JC
Witvliet Cv
Charlotte vanOyen
Cv
Feldman
Michelle E
ME
Shivy
Victoria A
VA
D000275:Adjustment Disorders / Q000523:psychology*; D002908:Chronic Disease; D016000:Cluster Analysis; D006801:Humans; D008297:Male; D008875:Middle Aged; D012720:Severity of Illness Index; D013313:Stress Disorders, Post-Traumatic / Q000145:classification / Q000523:psychology*; D014728:Veterans / Q000523:psychology*; D014744:Vietnam