The objective of this study was to identify the risk factors associated wit
h the dissociative symptomatology of borderline patients. The Dissociative
Experiences Scale-a 28-item self-report measure that has well documented re
liability and validity-was administered to 290 criteria-defined borderline
patients and 72 axis II comparison subjects. Semistructured interviews pert
aining to difficult childhood experiences and adult experiences of being a
victim of violence were administered to these patients blind to diagnostic
status. In the sample of borderline patients alone, multiple regression ana
lyses revealed that four risk factors were found to be significantly associ
ated with the level of dissociation reported by these 290 patients: inconsi
stent treatment by a caretaker, sexual abuse by a caretaker, witnessing sex
ual violence as a child, and adult rape history. In the combined sample of
axis II patients, the borderline diagnosis joined these four "traumatic" fa
ctors as a significant predictor of the overall level of dissociation repor
ted by these 362 personality-disordered inpatients. The results of this stu
dy suggest that both sexual trauma and something intrinsic to the borderlin
e diagnosis itself are risk factors for dissociative phenomena among border
line patients.