DSH is operationalized as dysfunctional behaviour associated with a heterogeneity of psychological or psychiatric disorders e.g., affective disorders, anxiety disorders, substance abuse, and eating disorders (Arensman & Kerkhof, 1996; Arensman, 1997; Ellis et al., 1996; Engstroem et al., 1996; Kienhorst et al., 1993). However, a common finding is that depressive symptoms (observer- or self-rated) and major depression appear to be highly prevalent among young DSH patients (Burgess et al., 1998; Goldston et al., 1998; Harrington et al., 1994). In these studies, co-morbidity with other types of psychopathology also appeared to be relatively high.