Characteristics of Child Maltreatment, Psychological Dissociation, and Somatoform Dissociation of Canadian Inmates

Abstract

ABSTRACT Data are presented on childhood maltreatment characteristics, psychological dissociation, somatoform dissociation, and offense types with a sample of 93 Canadian inmates (62 males and 31 females), with a mean age of 34 years (SD = 9.5). The present study includes findings based on the Child Maltreatment Interview Schedule-Short Form (CMIS-SF), the Detailed Assessment of Posttraumatic States (DAPS), the Multidimensional Dissociation Inventory (MDI), the Somatoform Dissociation Questionnaire (SDQ-20), and indices of violent and sexual offending during adulthood. Chi-square, Cohen's d, and regression analyses were conducted with the data. Results showed that women reported more childhood sexual abuse (CSA) than men, and men committed more violent and sexual offenses than women. Mean comparisons using Cohen's d statistic showed that inmates (N = 62) reported more trauma-related dissociation (DAPS) and more MDI dissociation compared to normative data for these instruments; however, inmates had lower somatoform dissociation scores when compared to published means of dissociative disorder, somatoform disorder, and eating-disorder patients. Inmates with CSA histories had higher SDQ-20 scores than those who did not. No differences were found between sex offenders and non-sex offenders in terms of probable PTSD, probable DID, MDI scales, or the SDQ-20. CSA that involved penetration predicted MDI dissociation and also predicted later sexual offending. Of the MDI scales, derealization and memory disturbance predicted sexual offending. Neither MDI scales nor any of the CMIS-SF maltreatment types predicted violent offending. Results are discussed in terms of treatment implications for incarcerated individuals with histories of child maltreatment.