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Table 3 Comparison of various diagnostic methods of Amsel’s criteria with Nugent’s score as a gold standard for the diagnosis of BV

From: Comparative study of Amsel’s criteria and Nugent scoring for diagnosis of bacterial vaginosis in a tertiary care hospital, Nepal

Diagnostic methods

Positive

Negative

Sensitivity

(%)

Specificity

(%)

PPV

(%)

NPV

(%)

Thin white homogenous discharge

81

60

60.7

43.4

21.0

81.7

pH > 4.5

114

27

89.3

21.2

21.9

88.9

Positive whiff test

20

121

35.7

91.2

50.0

85.1

Presence of Clue cell

13

128

46.4

100

100

88.3