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Table 1 Microscopy diagnostic performance vs. PCR

From: Automated microscopy for routine malaria diagnosis: a field comparison on Giemsa-stained blood films in Peru

 

n slides (pos, neg)

Diagnostic performance % (95% CI)

Sensitivity

Specificity

PPV

NPV

Accuracy

San Juan

 ll species

300 (123, 177)

68 (59–76)

100 (98–100)

100 (96–100)

82 (76–87)

87 (83–91)

 P. vivax

300 (102, 198)

70 (60–78)

100 (98–100)

100 (95–100)

86 (81–91)

90 (86–93)

 P. falciparum

300 (21, 279)

62 (38–82)

100 (99–100)

100 (75–100)

97 (95–99)

97 (95–99)

Santa Clara

 All speciesa

400 (151, 249)

42 (34–51)

97 (94–99)

90 (81–96)

74 (68–78)

77 (72–81)

 P. vivax

400 (100, 300)

46 (36–56)

98 (96–99)

88 (77–96)

84 (80–88)

85 (81–88)

 P. falciparum

400 (52, 348)

31 (19–45)

100 (99–100)

100 (79–100)

91 (87–93)

91 (88–94)

  1. Results for microscopy, separated by clinic. Sensitivity was stronger on San Juan slides. Specificity was strong on slides from both clinics
  2. aOne mixed species sample was detected