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Table 4 Performance of the all-inclusive models on each individual day of illness, from Day2 to Day7

From: Methods to discriminate primary from secondary dengue during acute symptomatic infection

  Performance
Accuracy Sens. Spec. PPV NPV
Day 2 (56 primary vs 55 secondary dengue)
 Panbio Indirect IgG 0.86 0.91 0.80 0.82 0.90
 In-house capture IgG 0.76 0.87 0.64 0.71 0.84
 In-house capture IgM/IgG ratio 0.80 0.78 0.82 0.81 0.79
Day 3 (102 primary vs 135 secondary dengue)
 Panbio Indirect IgG 0.86 0.86 0.86 0.89 0.82
 In-house capture IgG 0.83 0.81 0.85 0.88 0.77
 In-house capture IgM/IgG ratio 0.80 0.79 0.80 0.84 0.75
Day 4 (102 primary vs 136 secondary dengue)
 Panbio Indirect IgG 0.86 0.86 0.90 0.80 0.85
 In-house capture IgG 0.85 0.89 0.80 0.86 0.85
 In-house capture IgM/IgG ratio 0.82 0.87 0.77 0.83 0.81
Day 5 (101 primary vs 140 secondary dengue)
 Panbio Indirect IgG 0.87 0.94 0.77 0.85 0.90
 In-house capture IgG 0.85 0.94 0.73 0.83 0.89
 In-house capture IgM/IgG ratio 0.86 0.89 0.81 0.87 0.84
Day 6 (98 primary vs 116 secondary dengue)
 Panbio Indirect IgG 0.84 0.93 0.72 0.80 0.90
 In-house capture IgG 0.81 0.94 0.66 0.77 0.90
 In-house capture IgM/IgG ratio 0.85 0.91 0.79 0.83 0.88
Day 7 (82 primary vs 91 secondary dengue)
 Panbio Indirect IgG 0.79 0.74 0.84 0.84 0.74
 In-house capture IgG 0.80 0.93 0.66 0.75 0.90
 In-house capture IgM/IgG ratio 0.83 0.96 0.68 0.77 0.93