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Table 2 Results of the ROC curve analyses of the four indexes

From: The relationship of C-reactive protein/interleukin-6 concentrations between serum and synovial fluid in the diagnosis of periprosthetic joint infection

Tests

AUC (95% CI)

Best threshold

Sensitivity

Specificity

PPV

NPV

Serum CRP (mg/L)

0.821 (0.750–0.892)

9.785

0.726

0.805

0.750

0.785

Serum IL-6 (pg/mL)

0.847 (0.782–0.912)

8.980

0.807

0.818

0.781

0.840

Synovial CRP (mg/L)

0.861 (0.799–0.924)

1.632

0.936

0.688

0.707

0.930

Synovial IL-6 (pg/mL)

0.935 (0.895–0.976)

6590.289

0.903

0.883

0.862

0.919

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Journal of Orthopaedic Surgery and Research

ISSN: 1749-799X