Overlap of ILAR and Preliminary PRINTO Classification Criteria for Non-Systemic Juvenile Idiopathic Arthritis in an Established UK Cohort: Results from the Childhood Arthritis Prospective Study.

Under the preliminary PRINTO classification criteria for childhood arthritis, most children are not yet classified into a named category. These data can help support further delineation of the PRINTO criteria to ensure homogenous groups of children can be identified.