The objective of this study is to look for a relationship between childhood trauma and hostility as an adult. Toward this end, 294 recently abstinent cocaine or opiate dependent patients were asked to complete two questionnaires: the Childhood Trauma Questionnaire (CTQ) and the Hostility and Direction of Hostility Questionnaire (HDHQ). It was found that there were significant correlations between the HDHQ total hostility score and scores on the CTQ for childhood emotional abuse, physical abuse, sexual abuse, emotional neglect and physical neglect. Thus, these results suggest the possibility that childhood trauma may be a determinant of the personality dimension of hostility as an adult.