Table 5. Multiple linear regression analysis of the vertical margin distance (n = 141).

Note: Statistical significance was set at P < 0.05.

SM depth, submucosal invasion depth; Rb, rectum (below the peritoneal reflection); Ra, rectum (above the peritoneal reflection); Rs, rectosigmoid

	β	95% confidence interval	P value
Traction device	-11.8	(-62.0, 38.5)	0.65
Age, years	-2.6	(-4.0, -1.1)	<0.001
Sex, male	-19.0	(-56.8, 18.7)	0.32
Body mass index, kg/m2	2.0	(-3.1, 0.01)	0.43
Hyaluronic acid	-30.5	(-72.5, 11.4)	0.156
Non-expert	-13.1	(-49.3, 23.2)	0.48
Location, Rb vs Ra/Rs	30.1	(-12.4, 72.7)	0.167
Lesion size, mm	-4.0	(-14.5, 0.01)	0.45
SM depth, μm	-0.04	(-0.06, -0.01)	0.003