Factors associated with improvement in disease activity following initiation of etanercept in children and young people with Juvenile Idiopathic Arthritis: results from the British Society for Paediatric and Adolescent Rheumatology Etanercept Cohort Study.

However, in the current study, systemic JIA did not emerge as an independent predictor of response, although there was a weak trend for patients with systemic JIA to have a lower proportion of patients achieving higher ACR Pedi response compared with other subtypes (not statistically significant), but the proportion achieving ACR Pedi 30 responses was similar.

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When patients were grouped by ILAR category, JADAS-71 improved after 1 year of treatment in all ILAR subtypes, although this did not reach statistical significance in patients with persistent oligoarticular JIA ( Table 2 ).

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