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Table 3 Accuracy of RDT and peripheral thick blood smear in comparison with placental tissue impression smear for detecting placental malaria infection in 197 women at delivery

From: Accuracy of One Step malaria rapid diagnostic test (RDT) in detecting Plasmodium falciparum placental malaria infection in women living in Yaoundé, Cameroon

  Placental tissue impression smear Accuracy measure in % (95% CI)
Positive Negative Total
Per thick blood smear
 Positive 21 0 21 Sensitivity 80.77 (60.65–93.45)
 Negative 5 171 176 Specificity 100 (97.87–100)
 Total 26 171 197 Positive predictive value 100 (83.89–100)
Negative predictive value 97.16 (93.50–99.07)
One Step malaria pLDH
 Positive 16 0 16 Sensitivity 61.54 (40.57–79.77)
 Negative 10 171 181 Specificity 100 (97.87–100)
 Total 26 171 197 Positive predictive value 100 (79.41–100)
Negative predictive value 94.48 (90.07–97.32)
One Step malaria HRP-II
 Positive 25 6 31 Sensitivity 96.15 (80.36–99.90)
 Negative 1 165 166 Specificity 96.49 (92.52–98.78)
 Total 26 171 197 Positive predictive value 80.65 (62.53–92.55)
Negative predictive value 99.40 (96.69–99.98)
One Step malaria HRP-II + peripheral thick blood smear
 Positive 25 6 31 Sensitivity 96.15 (80.36–99.90)
 Negative 1 165 166 Specificity 96.49 (92.52–98.78)
 Total 26 171 197 Positive predictive value 80.65 (62.53–92.55)
Negative predictive value 99.40 (96.69–99.98)