Diagnostic accuracy of stereomicroscopy assessment of invasion depth in ex vivo specimens of early gastric cancer

Table 4 Multivariate analysis of risk factors misdiagnosed by stereomicroscopy

Factors	Odds ratio	95%CI	P value
Location
Middle	1	Reference
Upper	0.9	0.622-1.342	0.645
Lower	0.6	0.448-0.937	0.021
Residual stomach	0.7	0.230-2.294	0.586
Macroscopic type
Type 0-I	1	Reference
Type 0-IIa	0.4	0.173-1.122	0.086
Type 0-IIb	0.4	0.11-1.681	2.225
Type 0-IIc	0.5	0.189-1.218	0.122
Type 0-III	0.2	0.044-1.022	0.053
Tumor size (mm)
≤ 20	1	Reference
21-30	1.6	1.011-2.695	0.045
≥ 31	1.5	0.826-2.575	0.193
Ulceration
(−)	1	Reference
(+)	36.1	22.728-57.40	< 0.001
Histopathological
Differentiated	1	Reference
Undifferentiated	0.7	0.417-1.345	0.333
Horizontal margin
(−)	1	Reference
(+)	0.7	0.186-2.742	0.624
Vertical margin
(−)	1	Reference
(+)	0.1	0.025-0.221	< 0.001