Rationale and Objectives. A multitude of risk factors for falls has been reported, however many of these risk factors are not applicable to persons who use a wheelchair for mobility. Specific objectives include: (1) Describe the incidence and prevalence of wheelchair tips (near falls), falls, and fall-related injuries, (2) Describe the epidemiology of the wheelchair tip or fall event. (3) Create models for predicting wheelchair tips, falls, and fall-related injuries for elderly persons who use a wheelchair for mobility. (4) Determine healthcare utilization and direct costs associated with wheelchair-related fall injuries. (5) Describe patient perceived short- and long-term consequences of wheelchair-related falls.