Table 1

Response criteria and numbers for the UK and US cohorts of patients with juvenile idiopathic arthritis (JIA)

CohortUK cohort (n=197)US cohort (n=210)*
ACR-Ped30141 (71.5%)
30% improvement in joint count131 (63%)
ACR-Ped50119 (60.4%)
50% improvement in joint count107 (52%)
ACR-Ped7084 (43%)
70% improvement in joint count67 (32%)
Non-responders56 (28%)76 (37%)
  • * Data was missing for three individuals for whom response could not be assessed.

  • Note that all children who reach ACR-Ped70 automatically also reach ACR-Ped30 and ACR-Ped50, while those who achieve ACR-Ped50 also achieve ACR-Ped30.

  • ACR, American College of Rheumatology.