Table 1.

Sensitivity and specificity of the dengue NS1 rapid test at specific days post-infection.

Days Post-Infection	Sample No.	Rapid Test		RT-qPCR		Sensitivity	Specificity	Cohen’s Kappa Agreement
		Positive	Negative	Positive	Negative
Day 3	41	14	27	24	17	58.33%	100%	Moderate
Day 5	43	24	19	27	16	88.89%	100%	Almost perfect
Day 7	40	25	15	33	7	84.85%	100%	Moderate
Day 14	36	24	12	27	9	88.89%	100%	Substantial
Day 21	36	30	6	34	2	88.24%	100%	Moderate