[Injuries and their causes in bicycle accidents].

From April to September 1984 456 bicycle accidents were registered (73% adults, 27% children) and classified according to type and severity of injury and cause of accident. Of 594 injuries those of the upper extremities were predominant followed by mostly severe head injuries. The commonest injury was the fracture of clavicle and thereafter fractures of the radial head and distal radial fractures in children. 59% of accidents occurred without involvement of another person. 58% of accidents were caused by the bicycle riders themselves.