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Table 3 Performance characters of Modified Faine’s Criteria (with amendment) 2012

From: Utility of modified Faine’s criteria in diagnosis of leptospirosis

Performance character

A + B only

A + B + C MAT

≥1.400 &/ or PCR

A + B + C MAT

≥1.800 &/ or PCR

A + B + C rapid

immunochromatographic testa only

Sensitivity (%)

39.39

95.45

98.31

89.39

Specificity (%)

79.41

56.86

55.05

58.82

(+) Likelihood Ratio

1.91

2.21

2.19

2.17

(−) Likelihood Ratio

0.76

0.08

0.03

0.18

PPV (%)

55.32

58.88

54.21

58.42

NPV (%)

66.94

95.08

98.36

89.55

  1. A: Clinical history, B: Epidemiological history, C: Laboratory parameters
  2. a(Leptocheck WB, Zephyr Biomedicals, India)