Table 5. Sensitivity, specificity, postitive predictive value, negative predictive value, and accuracy of postoperative serum CEA level and biomarker chip.

	Abnormal postoperative CEA level (95% CI)	Positive biomarker chip (95% CI)	P
Sensitivity	60.4%	87.5%	0.003
	(45.3%-74.2%)	(74.8%-95.3%)
Specificity	83.2%	92.0%	0.003
	(78.0%-87.6%)	(87.9%-95.1%)
Positive predictive value	40.8%	67.7%	0.002
	(29.3%-53.2%)	(54.7%-79.1%)
Negative predictive value	91.6%	97.5%	0.006
	(87.2%-94.9%)	(94.6%-99.1%)
Accuracy	79.5%	91.3%	<0.001
	(74.9%-84.1%)	(88.1%-94.5%)

95% CI: 95% confidence interval