Table 3

Performance characteristics of two different methods compared to Giemsa stain microscopy

Test methods


PT

BN RDT


Sensitivity

100

97.2

(95% CI)

(96.6-100)

(92.0-99.4)

Specificity

97.4

93.6

(95% CI)

(93.6-99.3)

(88.5-96.9)

PPV1

96.4

91.2

(95% CI)

(91.0-99.0)

(84.5-95.7)

NPV2

100

98

(95% CI)

(97.6-100)

(94.2-99.6)

PLR3

39

15.2

(95% CI)

(14.8-103.0)

(8.3-27.6)

NLR4

0

0

(95% CI)

(0.0-0.0)

(0.0-0.9)

kappa

0.97

0.9

Std Error

0.06

0.06

p value

< 0.001

< 0.001


1 PPV: Positive predictive value 2 NPV: Negative predictive value

3 PLR: Positive likelihood ratio 4 NLR: Negative likelihood ratio

Nkrumah et al. BMC Infectious Diseases 2011 11:143   doi:10.1186/1471-2334-11-143

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