There used to be two ways to classify juvenile arthritis. There was the European classification of juvenile chronic arthritis (JCA). And there was the American classification of juvenile rheumatoid arthritis (JRA). Each system used different categories. This made it hard to use European and American research findings and treatment guidelines together.
To improve research and treatment, the International League of Associations for Rheumatology (ILAR) has devised a set of international criteria that uses the term "juvenile idiopathic arthritis" (JIA). The word "idiopathic" means "of unknown cause." This approach is now used by most researchers and health professionals.
The table below summarizes the three systems.
JRA does not include similar types of childhood arthritis (juvenile ankylosing spondylitis, juvenile psoriatic arthritis).
No matter the classification, children who have symptoms before age 16 are said to have juvenile arthritis.
ByHealthwise StaffPrimary Medical ReviewerSusan C. Kim, MD - PediatricsBrian D. O'Brien, MD - Internal MedicineE. Gregory Thompson, MD - Internal MedicineAdam Husney, MD - Family MedicineMartin J. Gabica, MD - Family MedicineSpecialist Medical ReviewerJohn Pope, MD - Pediatrics
Current as ofOctober 31, 2016
Current as of: October 31, 2016
Susan C. Kim, MD - Pediatrics
& Brian D. O'Brien, MD - Internal Medicine & E. Gregory Thompson, MD - Internal Medicine & Adam Husney, MD - Family Medicine & Martin J. Gabica, MD - Family Medicine & John Pope, MD - Pediatrics
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