BIRC5 and juvenile idiopathic arthritis: The area under the curve (AUC = 0.945 (95 CI 0.905–0.985)) confirmed the ability of survivin to distinguish children with JIA with a sensitivity of 0.843 (95 CI 0.732–0.915) and a specificity of 0.931 (95 CI 0.758–0.988); Youden Index value = 0.77 (Fig. 4).