Table 2. Factors associated with total regression after preoperative chemoradiotherapy; multivariate analysis.

Variable	Odd Ratio	95% confidence interval	p
Age	1.03	0.981–1.082	0.232
Gender  Male  Female	1 0.895	0.28–2.875	0.851
Pretreatment CEA  Normal range  Increased	1 1.954	0.472–8.098	0/356
cT stage  cT2  cT3  cT4	1 1.11 2.11	0.105–11.803 0.386–11.511	0.372
CD274(PD-L1) proportion	1.046	1.012–1.081	0.007