Staff gender ratio and aggression in a forensic psychiatric hospital.

Gender balance in acute psychiatric inpatient units remains a contentious issue. In terms of maintaining staff and patient safety, 'balance' is often considered by ensuring there are 'sufficient' male nurses present on each shift. In an ongoing programme of research into aggression, the authors investigated reported incidents of patient aggression and examined the gender ratio on each shift over a 6-month period. Contrary to the popular notion that a particular gender ratio might have some relationship with the likelihood of aggressive incidents, there was no statistically significant difference in the proportion of male staff working on the shifts when there was an aggressive incident compared with the shifts when there was no aggressive incident. Further, when an incident did occur, the severity of the incident bore no relationship with the proportion of male staff working on the shift. Nor did the gender of the shift leader have an impact on the decision to seclude the patient or the likelihood of completing an incident form following an aggressive incident. Staff confidence in managing aggression may be influenced by the presence of male staff. Further, aspects of prevention and management may be influenced by staff gender. However, results suggest there is no evidence that the frequency or severity of aggression is influenced by staff gender ratio.