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Table 1

From: Sensitivity and specificity of current diagnostic guidelines in children with macrophage activation syndrome complicating systemic juvenile idiopathic arthritis

Diagnostic guidelines MAS vs. active sJIA MAS vs. systemic infection
  Sensitivity Specificity Sensitivity Specificity
HLH 0.26 1 0.26 0.98
sJIA-associated MAS 0.87 0.91 0.87 0.85