Four hundred twenty-one consecutive patients admitted to an acute general medical ward and two acute rehabilitation medical wards were studied to compare the characteristics and outcomes of physically restrained patients and unrestrained patients. Restraints were used in 35 (13%) of the general medical patients and in 49 (34%) of the rehabilitation patients. The restrained general medical patients had higher mortality and morbidity rates than their unrestrained counterparts. Restrained patients had a higher prevalence of a psychiatric diagnosis, and major tranquilizers were used more than in their unrestrained counterparts in both settings. The general medical patients tended to have more than one type of restraint at a time, whereas the rehabilitation patients were restrained for longer proportions of their hospital stay. Thirty-three percent of the restrained patients whom we were able to interview expressed negative perceptions about the presence of the physical restraints. Moreover, it was found that the presence of cognitive and physical impairments were highly predictive of restraint use in both populations.