FIG 1.
Plots showing the qRT-PCR-positive sample CT values by target. (A) In test period 1, the BinaxNOW RDTs were positive for CT values from 11.7 to 26.0 for N1 and 11.7 to 26.3 for N2. The BinaxNOW RDT-negative tests had CT values from 23.6 to 39.8 for N1 and 24.3 to 38.8 for N2. The average CT for N1 is 24.3 with a standard deviation of 8.0. The average CT for N2 is 24.2 with a standard deviation of 7.7. (B) In test period 2, the BinaxNOW RDTs were positive for CT values from 11.9 to 24.9 for N1 and 12.3 to 25.6 for N2. The BinaxNOW RDT-negative tests had CT values from 20.7 to 39.0 for N1 and 21.0 to 39.0 for N2. The average CT for N1 is 23.6 with a standard deviation of 7.9. The average CT for N2 is 22.7 with a standard deviation of 7.5. (C) The combined data set has an average CT for N1 of 23.9 with a standard deviation of 7.9. The average CT for N2 is 23.4 with a standard deviation of 7.6. (D) ROC curve for qRT-PCR versus BinaxNOW of the combined data set using qRT-PCR CT values of ≤40 as the gold standard. Within each qRT-PCR target N1 and N2, data for panels A, B, and C are summarized in Table S3.