| American College of Rheumatology 1977 [2] | European League Against Rheumatism 1978 [3] | International League Against Rheumatism 1994 and 2001 [17] |
---|---|---|---|
Classification Title | Juvenile Rheumatoid Arthritis | Juvenile Chronic Arthritis | Juvenile Idiopathic Arthritis |
Symptom duration | Minimum 6Â weeks | Minimum 3Â month | Minimum 6Â weeks |
Subtypes | Systemic | Systemic | Systemic |
 | Polyarticular | Polyarticular | Polyarthritis RF negative |
 |  | JRA (RF positive Polyarticular) | Polyarthritis RF positive |
 | Pauciarticular | Pauciarticular | Oligoarthritis |
 Persistent | |||
 Extended | |||
 |  | Juvenile psoriatic | Psoriatic arthritis |
 |  | Juvenile ankylosing spondylitis | Enthesitis-related arthritis |
 |  | Arthritis associated with inflammatory bowel disease |  |
 |  |  | Undifferentiated arthritis |