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Table 2 Gram stain scoring for the diagnosis of VAP

From: Evaluation of semi-quantitative scoring of Gram staining or semi-quantitative culture for the diagnosis of ventilator-associated pneumonia: a retrospective comparison with quantitative culture

 

Sensitivity (%)

Specificity (%)

PPV (%)

NPV (%)

PLR

NLR

Kappa (95% CI)

≥1+

95

61

77

90

2.4

0.08

0.59 (0.45–0.72)

≥2+

77

86

88

73

5.5

0.27

0.62 (0.49–0.75)

≥3+

42

96

94

57

10.5

0.6

0.35 (0.23–0.47)

≥4+

20

96

89

47

5

0.83

0.15 (0.05–0.24)

  1. PPV positive predictive value, NPV negative predictive value, PLR positive likelihood ratio, NLR negative likelihood ratio.
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Journal of Intensive Care

ISSN: 2052-0492