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Table 1 Performance of RDT and microscopy compared to PCR among patients hospitalized with fever in Zanzibar (total n = 820)

From: Malaria prevalence and performance of diagnostic tests among patients hospitalized with acute undifferentiated fever in Zanzibar

 

RDT (n = 631)

Microscopy (n = 290)

Percentage (n/total)

Percentage (n/total)

Sensitivity

64% (36/56)

50% (18/36)

Specificity

98% (561/575)

99% (251/254)

Positive predictive value

72% (36/50)

86% (18/21)

Negative predictive value

97% (561/581)

93% (251/269)

  1. Numbers given for patients investigated with PCR and each test. Discrepancies are due to missing values
  2. RDT, rapid diagnostic test; PCR, polymerase chain reaction