1. Osteoarthritis: Definition, Etiology, and Natural History
Author: MD Elizabeth A. Arendt
Publisher: Springer Berlin Heidelberg
Osteoarthritis (OA) is one of the most common causes of disability in adults. The prevalence increases with age, with a surprising 13.9 % of the population over 25 years old being affected and 33.6 % of the population over 65 years old affected .