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Table 2 Different ratios of IgG/IgM for the diagnosis of secondary dengue fever

From: Differentiating secondary from primary dengue using IgG to IgM ratio in early dengue: an observational hospital based clinico-serological study from North India

IgG/ IgM ratio Sensitivity Specificity Accuracy LR+ LR-
2.0 86.8 100% 57.9 0.132
1.5 94% 100% 63.2 0.06
1.4 94.7 100.0% 63.2 0.053
1.3 94.7 100.0% 63.2 0.053
1.2 97.4% 97.4% 65.8 37.4 0.026
1.15 100% 97.4% 67.5 + 38.46 0
1.10a 100% 97.4% 67.5 + 38.46 0
0.9 100% 65.8% 78.1% 2.9 0
  1. This table shows the sensitivity, specificity, accuracy, LR+ and LR- calculated for different ratios of IgG/IgM for the diagnosis of secondary dengue fever
  2. Abbreviations: LR+ positive likelihood ratio, LR- negative likelihood ratio
  3. aMost useful value to diagnose secondary dengue. 1.10 is chosen as the most accurate ratio of IgG/IgM to diagnose based on all the variables used here
  4. ∞ value cannot be ascertained