Pao (1969) differentiated between delicate (low lethality) and coarse (high lethality) self-mutilators who cut. The "delicate" cutters were young, multiple episodic of superficial cuts and generally had borderline personality disorder diagnosis. The "coarse" cutters were older and generally psychotic. Ross and McKay (1979) categorized self-mutilators into nine groups: cutting, biting, abrading, severing, inserting, burning, ingesting or inhaling, hitting, and constricting.
Pao (1969) differentiated between delicate (low lethality) and coarse (high lethality) self-mutilators who cut. The "delicate" cutters were young, multiple episodic of superficial cuts and generally had borderline personality disorder diagnosis. The "coarse" cutters were older and generally psychotic. Ross and ,McKay (1979) categorized self-mutilators into nine groups: cutting, biting, abrading, severing, inserting, burning ingesting or inhaling, hitting, and constricting.