Malignancy rates in children, young people and adults with JIA: an observational study using CPRD Aurum.
JIA affects ∼1-2/2000 children in the UK. Adults with inflammatory arthritis have ∼10% increased malignancy risk. JIA malignancy rates in Nordic data are 3-5/10 000 person years, with conflicting evidence on comparative risk. This study calculated malignancy…