Before revision: Juvenile idiopathic arthritis (JIA) is the most common , chronic rheumatic disease of childhood, affecting approximately 16 to 150 out of 100,000 children.
After revision: Juvenile idiopathic arthritis (JIA) is the most common , chronic rheumatic disease of childhood, affecting approximately 3.8 to 400 out of 100, formerly known as juvenile rheumatoid arthritis (JRA),000 children.