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Table 2 Comparison of all the tests against the reference PCR method

From: Diagnostic performance of a novel loop-mediated isothermal amplification (LAMP) assay targeting the apicoplast genome for malaria diagnosis in a field setting in sub-Saharan Africa

 

PCR +ve

PCR −ve

Total

 

LAMP +ve

120

7

127

Sn = 91.6 % (95 % CI 85.5–95.7); Sp = 96.7 % (95 % CI 93.3–98.7)

LAMP −ve

11

203

214

PPV = 94.5 % (95 % CI 89.1–97.8); NPV = 94.9 % (95 % CI 91.1–97.4)

κ = 0.91 (95 % CI 0.84-0.94)

Mx +ve

102

2

104

Sn = 77.9 % (95 % CI 70.1–84.7); Sp = 99.1 % (95 % CI 96.6–99.9)

Mx −ve

29

208

237

PPV = 98.1 % (95 % CI 93.2–99.8); NPV = 87.8 % (95 % CI 82.9–91.7)

κ = 0.80 (95 % CI 0.73-0.87)

RDT +ve

100

26

126

Sn = 76.3 % (95 % CI 68.1–83.3); Sp = 87.6 % (95 % CI 82.4–91.8)

RDT −ve

31

184

215

PPV = 79.4 % (95 % CI 71.3–86.1); NPV = 85.6 % (95 % CI 80.2–90.1)

κ = 0.64 (95 % CI 0.56-0.73)

Total

131

210

341

 
  1. Sn sensitivity, Sp specificity, κ Kappa coefficient, PPV positive predictive value, NPV negative predictive value