Table 2.

Sensitivity and specificity of the ctDNA methylation test and CEA in patients with tumor load

Biopsy finding	ctDNA methylation test (n = 804)*
	n	Positive results (n)	Negative results (n)	Sensitivity %	Specificity %
Stage I	7	6	1	85.7
Stage II	43	32	11	74.4
Stage III	125	104	21	83.2
Stage IV	227	197	30	86.8
Total	402	339	63	84.3
Normal controls	402	22	380		94.5