Comparison of two dengue NS1 rapid tests for sensitivity, specificity and relationship to viraemia and antibody responses

Table 3 Sensitivity of the dengue RDTs in samples collected within 3 days of illness onset versus those collected at a later time

		BR-NS1	SD-NS1	SD NS1 or IgM^b	SD NS1 or IgM or IgG^b
Status	Total (n =)	% Sensitivity (95% CI)
Test sample ≤ 3 days of illness	156	60.9 (52.8 - 68.6)	62.2 (54.1 - 69.8)	73.1 (65.4 - 79.9)	80.1 (73.0 - 86.1)
Test sample > 3 days of illness	89	62.9 (52.0 - 72.9)	62.9 (52.0 - 72.9)	79.8 (69.9 - 87.6)	89.9 (81.7 - 95.3)
P value^a		0.7860	1.0000	0.2809	0.0498

^aFisher's exact test
^bthe detection of IgM or IgG in the rapid test is not sufficient for a definitive diagnosis of dengue and results are reported here for comparative purposes only

ISSN: 1471-2334