Table 4.
Prediction of recurrence on the basis of postoperative serum CEA levels in 397 patients with a preoperative serum CEA level of ≥5 ng/mL
| Serum CEA after surgery | ||||
|---|---|---|---|---|
| <5 ng/mL | ≥5 ng/mL | <8 ng/mL | ≥8 ng/mL | |
| No recurrence (n = 325) | 201 (61.8) | 124 (38.2) | 284 (87.4) | 41 (12.6) | 
| Recurrence (n = 72) | 41 (56.9) | 31 (43.1) | 56 (77.8) | 16 (22.2) | 
| Sensitivity | 43.1 | 22.2 | ||
| Specificity | 61.8 | 87.4 | ||
| Positive predictive value | 20.0 | 28.1 | ||
| Negative predictive value | 83.1 | 83.5 | ||
| Accuracy | 58.4 | 75.6 | ||
Values are presented as n (%) or percentages.