Figure 3

Effect of localized versus systemic infection. Serum concentrations of CD64 (A), procalcitonin (B) ), CRP (C) and white blood count (D) among patients with crystal-induced arthritis (CIA), septic arthritis with positive blood culture (SA BC-positive) and septic arthritis with negative blood culture (SA BC-negative). Horizontal lines indicate cut-off values for CD64 (A) and PCT (B), derived from ROC curve analysis. PCT values above 5 mg/L are plotted as 5 mg/L.