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Observed percent agreement (%; number of samples in agreement) and Cohen's kappa coefficient (κ; 95% CI) between the listed assays in the study's 135 samples.
| Assay | MSD Spike | MSD NC | SPRi RBD |
|---|---|---|---|
| MSD RBD | 94.1 (127) | 96.3 (130) | 91.1 (123) |
| κ=0.860 (0.766–0.954) | κ=0.913 (0.838–0.988) | κ =0.798 (0.688–0.907) | |
| MSD Spike | 97.8 (132) | 95.6 (129) | |
| κ=0.945 (0.885–1) | κ=0.895 (0.813–0.977) | ||
| MSD NC | 94.8 (128) | ||
| κ=0.878 (0.791–0.966) |
