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Table 4 Accuracy of microscopy and RDT in detecting placental malaria infection in peripheral blood among 173 women at Mbale regional referral hospital between March and November 2010

From: Placental Plasmodium falciparum malaria infection: Operational accuracy of HRP2 rapid diagnostic tests in a malaria endemic setting

   Placental histology    
+(n = 21) (n = 152) Total Accuracy measure(95%CI)
Microscopy + 17 12 29 Sensitivity 76.2(52.4-90.8)
   4 140 144 Specificity 92.1(86.3-95.7)
      PPV* 57.1(37.4-74.9)
      NPV‡ 96.6(91.7-98.7)
RDTs + 17 19 36 Sensitivity 80.9(57.4-93.7)
   4 133 137 Specificity 87.5(80.9-92.1)
      PPV 47.2(30.7-64.2)
      NPV 97.1(92.2-99.1)
Microscopy + 19 27 46 Sensitivity 90.5(68.2-98.3)
+RDTs   2 125 127 Specificity 82.2(75.0-87.7)
      PPV 41.3(27.3-56.7)
      NPV 98.4(93.9-99.7)