Table 4

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

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


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.

de Jager et al. Critical Care 2010 14:R192   doi:10.1186/cc9309

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