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Table 2 Comparative indicators of Parascreen™, when using PCR and EM as gold standards.

From: Field evaluation of a rapid diagnostic test (Parascreen™) for malaria diagnosis in the Peruvian Amazon

gold standard

Results by Parascreen™

 

Plasmodium

Species

Sensitivity

[%(95%CI)] a

Specificity

[%(95%CI)]

PPV b

[%(95%CI)]

PPN c

[%(95%CI)]

Likehood ratio

      

Positive test

Negative test

EM

non-P. falciparum

77.1

(67.0-84.4)

97.6

(94.8-98.9)

91.4

(82.5-96.0)

92.7

(89.0-95.3)

32

0.22

 

P. falciparum

53.5

(30.1-75.2)

98.7

(96.8-99.5)

66.7

(39.1-86.2)

97.8

(95.6-98.9)

42.27

0.47

PCR

non-P. falciparum

76.1

(66.3-83.8)

99.2

(97.0-99.8)

97.1

(90.0-99.2)

92

(88.1-94.7)

92.51

0.24

 

P. falciparum

81.8

(52.3-94.9)

99.1

(97.3-99.7)

75

(46.8-91.1)

99.4

(97.7-99.8)

87.27

0.18

  1. a.- Confidence interval at 95%.
  2. b.- Positive predictive value.
  3. c.- Negative predictive value.