Factors associated with the use of physical restraints for agitated patients in psychiatric emergency rooms

ObjectiveTo examine factors associated with physical restraint in psychiatric emergency rooms.MethodWe extracted variables likely to predict use of physical restraints from a large randomised trial undertaken in three psychiatric emergency rooms in Rio de Janeiro. We fitted a Bayesian binary multivariate model using only variables clearly preceding the restraints.ResultsOf 301 agitated, aggressive people admitted to emergency rooms, 73 (24%) were restrained during the first 2 h of admission. In Rio, younger people (OR=1.03 for each year younger), exhibiting intense (OR=2.53) or extreme agitation (OR=7.71), thought to result from substance misuse (OR=1.75) or diagnoses other than psychosis (OR=1.88), arriving in the morning (OR=1.64) were at greater risk of physical restraints than older, less severely aggressive or agitated people, arriving at the hospital during the afternoon or night. Hospital, gender, first admission to hospital and medication were not associated with risk of being restrained.ConclusionRestraint practices in Rio are predictable and based on a limited clinical assessment. Predictive factors for physical restraint may vary worldwide, but should be monitored and studied to assist training, and to establish programs to evaluate and refine this controversial practice.