They don't look like weightlifters...nurses and back injury.

Abstract

This study, done in the Regional Hospital Board area, of incidence rates of back injury, based on ACC claims, shows significantly higher rates of back injury in nurses as compared with clerical workers, and also differing rates between staff nurses (lowest), enrolled nurses and nurse aides (highest). There were no significant differences found between nurses working in a general hospital setting, a geriatric hospital or in the community. Nurses' working conditions are discussed to try to explain these differences.