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Table 4 Sensitivity, specificity, positive predictive value and negative predictive value for infection markers in diagnosing bacteremia

From: Lymphocytopenia and neutrophil-lymphocyte count ratio predict bacteremia better than conventional infection markers in an emergency care unit

  Sensitivity (%) Specificity (%) PPV (%) NPV (%)
CRP level 75.0 37.0 54.3 59.6
WBC count 57.6 53.3 55.2 55.7
Neutrophil count 57.6 59.8 58.9 58.5
Lymphocyte count 73.9 57.6 63.6 68.8
NLCR 77.2 63.0 67.6 73.4
  1. Sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) of the C-reactive protein (CRP) level (cut-off ≥50 mg/l), white blood cell (WBC) count (cut-off < 4.0 × 109/l or > 12.0 × 109/l), neutrophil count (cut-off > 10.0 × 109/l), lymphocyte count (cut off < 1.0 × 109/l) and the neutrophil-lymphocyte count ratio (NLCR) (cut-off > 10.0) in diagnosing bacteremia.