IGFBP3 and juvenile idiopathic arthritis: The results of CS/DS, IGF-1, and IGFBP-3 concentration measurements in the serum of all examined groups, i.e., the group of healthy children (the control group), the group of newly diagnosed, untreated JIA children, and the group of the same children after their treatment and clinical improvement, broken down by sex and JIA type, are presented in Table 2, Table 3 and Table 4.