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Table 4 Performance of Gazelle™ compared to microscopy and RDT with PCR as gold standard

From: Performance of a sensitive haemozoin‐based malaria diagnostic test validated for vivax malaria diagnosis in Brazilian Amazon

n = 276 Gazelle™ Microscopy RDT
Sensitivity 72.1 %
124/172
75.0 %
129/172
62.8 %
108/172
Specificity 99.0 %
103/104
99.0 %
103/104
99.0 %
103/104
Positive predictive value 99.2 % 99.2 % 99.1 %
Negative predictive value 68.2 % 70.6 % 61.7 %
Likelihood ratio
of a positive test
75.0 78.0 65.3
Likelihood ratio
of a negative test
0.28 0.25 0.38
Accuracy
(ROC analysis)
82.3 % 84.1 % 76.5 %