IL10 and polyarticular juvenile idiopathic arthritis: We observed that patients with polyarticular JIA did show significantly lower serum IL-10 levels (2.5 ± 1.3 pg/ml) compared to those with systemic JIA (5.7 ± 1.5 pg/ml) and patients with oligoarticular JIA (9.6 ± 1.7 pg/ml); P <0.01, Table 3.