Fig. 2
From: Epidemiology and comorbidity of juvenile idiopathic arthritis in Poland– a nationwide study
JIA incidence rate (IR) with Poisson-based 95% Confidence Intervals (95% CI) within the pediatric population over time. Notes: Epidemiologic estimates are calculated with the population at risk as the number of individuals with JIA < 16 years within the childhood population below 16 years of age