Table 2. Performance characteristics of the RT-PCR assay performed at triage.

	Influenza A/ B		Influenza A		Influenza B
Rapid RT-PCR assay in the ED	Positive	Negative	Positive	Negative	Positive	Negative
Positive (n)	71	1	27	1	44	0
Negative (n)	1	114	0	159	1	142
Sensitivity	0.98 (0.91–1.00)		1.00 (0.84–1.00)		0.98 (0.87–1.00)
Specificity	0.99 (0.94–1.00)		0.99 (0.96–1.00)		1.00 (0.97–1.00)
NPV	0.99 (0.94–1.00)		1.00 (0.97–1.00)		0.99 (0.96–1.00)
PPV	0.98 (0.91–1.00)		0.96 (0.79–1.00)		1.00 (0.90–1.00)

Data are presented as n or rate (95% CI). ED: emergency department; NPV: negative predictive value; PPV: positive predictive value