Table 3: Univariate analysis of factors affecting accuracy of determinations of the depth of cancer invasion.

Correct ( )Incorrect ( )Accuracy (%) valueOdds ratio95% CI (%)

Stomach location0.802
 Upper third401276.9%1
 Middle third321371.1%0.5141.3540.54–3.37
 Lower third2317874.7%0.7381.1120.56–2.25

Macroscopic features<0.001
 Elevated type1312186.1%1
 UL(−) type1482386.5%0.9240.9690.51–1.83
 UL(+) type245928.9%<0.00115.337.91–29.71

Tumor size<0.001
 ≤2 cm2173685.7%1
 >2 cm, ≤3 cm523261.9%<0.0013.7092.11–6.52
 >3 cm343549.2%<0.0016.2053.44–11.18

Histology
 Differentiated2546080.8%1
 Undifferentiated494353.2%<0.0013.7152.26–6.10

EUS type
 US-probe 2544485.2%1
 US-endoscope495945.3%<0.0016.9514.23–11.41

UL(+): ulcerated; UL(−): nonulcerated; EUS: endoscopic ultrasonography; US: ultrasound; ER: endoscopic resection.