Accuracy of Endoscopic Ultrasonography for Determining the Treatment Method for Early Gastric Cancer

Table 2

Accuracy of cancer invasion depth as determined by endoscopic ultrasound.

Histology	EUS
	M/SM1	SM2	MP deeper	Total	Accuracy
m/sm1	260	56	11	327	79.5% (260/327)
sm2	20	43	16	79	54.4% (43/79)
PPV	92.8% (260/280)	43.4% (43/99)	—	—

EUS: endoscopic ultrasonography; PPV: positive predictive value; M/SM1, SM2, and MP deeper are classifications of the depth of tumor invasion into the submucosa (see text for full description).