Dissociation : Vol. 6, No. 2/3 (June/Sept. 1993)

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Dissociation : Vol. 6, No.2/3, p. 126-135 : The differentiation of patients with MPD of DDNOS from patients with a cluster B personality disorder
(Ridgeview Institute and the International Society for the Study of Multiple Personality and Dissociation, 1993-06) Boon, Suzette; Draijer, Nel, 1950-
Because of similarities in presentation, multiple personality disorder (MPD) and dissociative disorder not otherwise specified (DDNOS) can be misdiagnosed as borderline personality disorder (BPD) or another cluster B personality disorder. In order to find distinguishing symptoms, four groups of patients are compared: DDNOS patients (N=24); MPD patients (N=49); patients with BPD or histrionic personality disorder, referred for evaluation of dissociative pathology (N=21); control patients with a cluster B personality disorder (N=19). All patients were interviewed with the Structured Clinical Interview for DSM-III-R Dissociative Disorders (SCID-D) and the Structured Trauma Interview (STI). Although there are many areas of overlap in the phenomenology of patients with MPD or DDNOS and patients with a "cluster B" personality disorder, we clearly found that these groups can be differentiated by the severity and cluster of dissociative symptoms, the prevalence of some Schneiderian symptoms, and the severity of childhood trauma.