The epidemiology of fifth metatarsal fracture surgeries in Japan using nationwide hospital claim database.

Background: A fifth metatarsal fracture is a common condition with various causes. The epidemiology of this condition is well established in certain populations such as athletes, and people from Western countries, but not in Japan. We aimed to study the epidemiology of fifth metatarsal fracture surgeries in Japan among various age groups from school age to elderly and hypothesized that they are more common in older Japanese patients.