The demographics of hand injuries and disorders depend on the specific injury or disorder in question. Repetitive stress injuries (RSIs) of the hands are often related to occupation; for example, nurse anesthetists, dental hygienists, keyboard instrumentalists, word processors, violinists, and some assembly line workers are at relatively high risk of developing carpal tunnel syndrome or tendinitis of the fingers related to their work. Nearly 17% of all disabling work injuries in the United States involve the fingers, most often when the finger strikes or is jammed against a hard surface. Over 25% of athletic injuries involve the hand or wrist.