IL10 and juvenile idiopathic arthritis: At the same time, in girls with JIA, the frequency of the IL10 rs1800872*A allele was significantly higher, and of the IL10 rs1800872*CС genotype – significantly lower in the absence of the response to methotrexate than in its presence (*A: 38.16% vs. 24.81%, P = 0.029, pcor = 0.027, OR = 1.87, 95% CI 1.069–3.162; *CC: 36.84% vs. 57.36%, P = 0.028, pcor = 0.029, OR = 0.434, 95% CI 0.215–0.932, respectively).