Table 2.
Cutoff determination for three matrices.
| Serum/plasma | DBS | Saliva | |
|---|---|---|---|
| Negative n | 100 | 97 | 106 |
| Positive n | 40 | 21 | 29 |
| Youden Index | 0.89 | 3.05 | 0.88 |
| fLoQ | 1.25 | 3.91 | 1.25 |
| Cutoff chosen | 1.25 | 3.91 | 1.25 |
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