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Table 2 Autoscope 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
 All species 300 (123, 177) 72 (64–80) 85 (79–90) 77 (68–84) 82 (75–87) 80 (75–84)
 P. vivax 300 (102, 198) 72 (62–80) 83 (77–88) 69 (59–77) 85 (79–90) 79 (74–83)
 P. falciparum 300 (21, 279) 33 (15–57) 99 (97–100) 78 (40–97) 95 (92–97) 95 (91–97)
Santa Clara
 All speciesa 400 (151, 249) 52 (44–60) 70 (64–76) 52 (43–59) 71 (65–76) 64 (58–68)
 P. vivax 400 (100, 300) 60 (50–70) 71 (66–76) 41 (33–49) 84 (79–89) 69 (64–73)
 P. falciparum 400 (52, 348) 4 (0–13) 99 (98–100) 50 (7–93) 87 (84–90) 87 (83–90)
  1. Results for autoscope on all slides, separated by clinic
  2. aOnly one mixed species sample was detected