Table 3. Clinical performance of the ImmuneMed Dengue NS1 Ag Rapid Ⅰ test according to the period from symptom onset to sample collection

Ann Clin Microbiol 2024;27(3):1. Clinical performance of the ImmuneMed Dengue NS1 Ag Rapid I test for the diagnosis of dengue fever: a diagnostic accuracy study

Table 3. Clinical performance of the ImmuneMed Dengue NS1 Ag Rapid Ⅰ test according to the period from symptom onset to sample collection

Time from symptom onset	ImmuneMed NS1 Ag Rapid I	RT-PCR
Time from symptom onset	ImmuneMed NS1 Ag Rapid I	Positive	Negative
< 3 days^a	Positive	63	0
	Negative	0	161
	Total	63	161
≥ 3 days^b	Positive	37	0
	Negative	0	161
	Total	37	161

^aSensitivity, 100% (95% confidence interval [CI], 94%–100%); specificity, 100% (95% CI, 98%–100%); ^bSensitivity, 100% (95% CI, 91%–100%); specificity, 100% (95% CI, 98%–100%). Because a negative control was not available for symptom onset, we used all 161 samples in each group. Abbreviations: RT-PCR, real-time reverse transcription polymerase chain reaction.