Table 4. Agreement of positivity between CEA assays using a cutoff value of 5.0 ng/mL.
| ADVIA Centaur XP | ARCHITECT i2000sr | Elecsys E170 | |
|---|---|---|---|
| ARCHITECT i2000sr | 70.7% | ||
| Elecsys E170 | 74.6% | 95.2% | |
| UniCel DxI800 | 81.9% | 87.3% | 92.1% |
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