Table 2 Comparison of Elecsys ECLIA N-antigen measurements in EDTA/Heparin plasma without vs with addition of the extraction buffer. (95% confidence intervals).
From: Sensitivity and performance of three novel quantitative assays of SARS-CoV-2 nucleoprotein in blood
Sample type | EDTA without vs with extraction buffer | Heparin without vs with extraction buffer |
|---|---|---|
Number of samples | 10 | 10 |
Slope | 1.03 (0.96 to 1.1) | 0.99 (0.86 to 1.1) |
Y-intercept | − 0.046 (− 0.31 to 0.22) | 0.14 (− 0.41 to 0.68) |
Spearman r | > 0.99 | > 0.99 |
