Table 2. Positive percent agreement, including 95% confidence intervals, for all assays with reference to both nasopharyngeal and anterior nares PCR.

Assay	NP Swab PCR		AN Swab PCR
	Sensitivity < = 1000 copies/μL (95% CI)	Sensitivity >1000 copies/μL (95% CI)	Sensitivity < = 1000 copies/μL (95% CI)	Sensitivity >1000 copies/μL (95% CI)
OA-LFA	25% (12%-42%), 9/36	92% (83%-97%), 66/72	55% (36%-73%), 17/31	98% (91%-100%), 58/59
Sofia®	38% (22%-55%), 14/37	92% (83%-97%), 67/73	64% (45%-80%), 21/33	98% (91%-100%), 58/59
BinaxNOW™	53% (35%-70%), 19/36	96% (88%-99%), 70/73	79% (61%-91%), 26/33	98% (91%-100%), 58/59
MSD Ag ELISA	46% (29%-63%), 17/37	96% (88%-99%), 70/73	76% (58%-89%), 25/33	100% (94%-100%), 59/59
AN Swab PCR	57% (39%-73%), 21/37	97% (90%-100%), 71/73	NA	NA

Results are binned into two groups based on if the reference method measured less than or equal or above 1000 copies per microliter.