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.