Age of onset <16 yr
(swelling or excess joint fluid), or 2 or more of these: less than full range of motion, tenderness or pain on motion, ; increased warmth in at least 1 joint
3.Above signs (seen by doc)for > 6wks
4.Type seen in first 6 mo:
a.Polyarthritis: ?5 inflamed joints
b.Oligoarthritis: 4 or fewer joints
5.No other cause.