Eighty assaults on staff were reported for 1991–1992, and 39 were reported for 1994–1998. No differences in type or frequency of assault were found by type of residential site, and no staff victim refused to participate in data collection for this study. Data on the age of staff members were not available.
Characteristics of assailants
In 1991–1992, in a population of 242 male patients and 175 female patients with an average age of 39±11.03 years, 57 male patients, or 71.2 percent, and 23 female patients, or 29.8 percent, assaulted staff. The patients committed a total of 80 assaults, including 30 physical assaults (37.5 percent of the assaults), seven sexual assaults (9.7 percent), one nonverbal assault (1.3 percent), and 42 verbal assaults (52.5 percent). The average age of the assaultive patients was 37±14.85 years. Schizophrenia was the most common diagnosis among the assaultive patients; 73 percent of the assaultive patients had this diagnosis.
In 1994–1998, in a population of 312 male patients and 297 female patients with an average of 43±11 years, 20 male patients, or 51 percent, and 19 female patients, or 49 percent, committed assaults. They committed a total of 39 assaults. Twenty-two assaults, or 57.1 percent, were physical assaults; four, or 10.2 percent, were sexual assaults; four, or 10.2 percent, were nonverbal assaults; and nine, or 23.1 percent, were verbal assaults. The average age of the assaultive patients was 37±7.3 years. The most common diagnosis was schizophrenia; 54 percent of the assaultive patients had this diagnosis.
Characteristics of staff victims
In 1991–1992, in a population of 136 male and 231 female residential staff, 32 male staff members (40 percent) and 48 female staff members (60 percent) were victims. Eighteen staff members, or 17.9 percent, had swollen bruises; 37, or 42 percent, had some degree of acute stress disorder; and 29, or 44 percent, had symptoms of hypervigilance, sleep disturbance, and intrusive memories.
In 1994–1998, in a population of 660 male and 1,073 female residential staff, 39 staff members were victims of assaults by patients. Fourteen male staff members, or 44.3 percent, and 25 female staff members, or 65.7 percent, were victims. Nine staff members, or 23.1 percent, had swollen bruises; 27, or 69.2 percent, had some degree of acute stress disorder; and 19, or 48.7 percent, had symptoms of hypervigilance, sleep disturbance, and instrusive memories.
Front-line staff were the targets of assault in all 80 incidents of assault reported in 1991–1992. They were the target in 26 of the incidents reported in 1994–1998, or 66.6 percent.
Patients' overall rate of assaultive incidents per person-year declined by 61 percent between the two time periods, from 2,131.5 to 834. In 1991–1992, the rate of assaults per person-year for male patients was 1.8 times higher than for female patients (.118 versus .066). Between 1991–1992 and 1994–1998, the rate per person-year for male patients declined, and in 1994–1998 the rate per person-year for male and female patients was equal (.009 for both male and female patients).