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. 2021 Aug 11;9(1):10.1128/spectrum.00083-21. doi: 10.1128/spectrum.00083-21

TABLE 2.

Summary of the clinical evaluation of the COVID-19 2SF assaya

COVID-19 2SF assay result Standard-of-care assay result (no.)
Positive Negative Total
Positive 35 0 35
Negative 6 21 27
Total 41 21 62
a

Positive percent agreement (PPA), 85.4% (95% confidence interval [CI], 70.8 to 94.4%). Negative percent agreement (NPA), 100% (95% CI, 83.9 to 100%).