Table 2.

Sensitivity and specificity of the Dengue NS1 Ag Strip test and 1997 and 2009 WHO classification schemes relative to RT-PCR and virus isolation

Diagnostic modality	Sensitivity (95% CI)*	Specificity (95% CI)†
Dengue NS1 Strip 15 minutes	77.3% (69.8–83.6)	100% (98.5)‡
Dengue NS1 Strip 30 minutes	80.5% (73.5–86.5)	100% (98.5)‡
WHO 1997	95.4% (90.9–98.2)	36.0% (29.4–43.1)
WHO 2009	79.9% (72.7–85.9)	57.0% (49.8–64.0)

^*N = 154.

^†N = 200.

^‡Lower one-sided (exact).