Table 6 Diagnostic accuracy of the tests of infection.

From: Inflammation and nutrition based screening tests for detection of infection in cases of rapid hip destruction

Index

Accuracy (95% CI)

Sensitivity (95% CI)

Specificity (95% CI)

PPV (95% CI)

NPV (95% CI)

MRI: inflammatory spread to soft tissues surrounding hip joints

0.76 (0.62–0.87)

0.77 (0.46–0.95)

0.76 (0.59–0.88)

0.53 (0.29–0.76)

0.90 (0.74–0.98)

PAC: positive

0.94 (0.84–0.99)

0.77 (0.46–0.95)

1.00 (0.86–1.00)

1.00 (0.59–1.00)

0.93 (0.80–0.98)

Neutrophilic infiltration > 5/HPF

0.86 (0.73–0.94)

0.77 (0.46–0.95)

0.89 (0.75–0.97)

0.71 (0.42–0.92)

0.92 (0.78–0.98)

Neutrophilic infiltration > 10/HPF

0.88 (0.76–0.96)

0.54 (0.25–0.81)

1.00 (0.86–1.00)

1.00 (0.47–1.00)

0.86 (0.72–0.95)

  1. CI Confidence interval, MRI Magnetic resonance imaging, NPV Negative predictive value, PAC Preoperative joint aspiration culture, PPV Positive predictive value, WBC White blood cell.
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