Radiomics for predicting perineural invasion status in rectal cancer

Table 2 Risk factors selected by logistic regression analysis

Variables	Univariate		Multivariate
	OR	P value	OR	P value
Age	1.001	0.961	-	-
Sex	0.787	0.358	-	-
Volume	1.000	1.000	-	-
Location	1.779	0.050	1.470	0.265
cT stage	2.328	< 0.001	1.636	0.087
cN stage	1.550	< 0.001	1.458	0.001
CEA	2.631	< 0.001	2.528	0.003
CA19-9	1.478	0.182	-	-
CA125	0.717	0.484	-	-
Rad-score	3.012	< 0.001	3.148	< 0.001

If P value < 0.1, variables were included in the model. CEA: Carcinoembryonic antigen; CA19-9: Carbohydrate antigen 19-9; CA125: Carbohydrate antigen 125; OR: Odds ratio.