Diagnostic Criteria of JRA
It is defined as ahritis of one or more joints with onset below 16 yr age and persisting for atleast 6 weeks Ref Ghai pediatrics eighth edition pg no 625
Disease persisting 6 weeks or longer
Onset before age 16 years
Ahritis involving >5 joints
Polyaicular JRA ANA is +ve
Musculoskeletal  disorders