Value of enhanced computed tomography in differentiating small mesenchymal tumours of the gastrointestinal from smooth muscle tumours

Table 3 Receiver operating characteristic curve analysis of carcinoembryonic antigen and carbohydrate antigen 19-9 levels for the diagnosis of gastric mesenchymal tumour

Indicators	Area under the curve	Standard error	P value	95%CI	Optimal cut-off value	Sensitivity	Specificity
CEA	0.879	0.036	0.000	0.808-0.950	1.145	0.850	0.675
CA19-9	0.782	0.050	0.000	0.684-0.880	8.880	0.600	0.800

CEA: Carcinoembryonic antigen; CA19-9: Carbohydrate antigen 19-9.