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Table 2 Sensitivity, specificity, predicative values of optical microscopy (OM) and NADAL® Malaria Test 4 species with PCR as gold standard

From: Malaria determining risk factors at the household level in two rural villages of mainland Equatorial Guinea

  Positive PCR (n = 160) Negative PCR (n = 72) Sensitivity % (CI95) Specificity % (CI95) PPV % (CI95) NPV % (CI95)
Microscopy
 Positive (n = 112) 108 4 68.8 (60.5–75.5) 94.4 (86.4–98.5) 96.4 (91.2–98.6) 57.6 (51.8–63.3)
 Negative (n = 118) 50 68
 Missing (n = 2) 2      
NADAL test
 Positive (n = 112) 105 7 65.6 (57.7–72.9) 90.3 (81.0–96.0) 93.8 (88.0–96.8) 54.2 (48.5–59.7)
 Negative (n = 120) 55 65
   P-value = 0.212*     
  1. PVP positive predictive value, NVP negative predictive value, CI 95 95% confidence interval
  2. * DeLong’s test for two correlated ROC curves with AUCmicroscopy = 81.6% and AUCNADAL test = 80.0%