Table 3.

Diagnostic value of various cut-off point of the IgG/IgM ratio in determining secondary DENV infection

IgG / IgM ratio	Sensitivity	Specificity	Accuracy	LR+
≥0.92	86.11	91.67	87.50	10.33
≥1.13	83.33	91.67	85.42	10.00
≥1.14a	80.56	91.67	83.33	9.67
≥1.36	77.78	91.67	81.25	9.33
≥1.73	77.78	100.00	83.33

^aBest cut-off point