Risk factors influencing sphincter preservation in laparoscopic radical rectal cancer surgery

Table 2 Logistic regression analysis of sphincter preservation in laparoscopic radical rectal cancer surgery

Variable	β	P value	OR	95%CI
Residence	-1.046	0.131	0.351	0.090-1.367
Colonic polyps	-2.207	0.006	0.110	0.023-0.535
Neoadjuvant chemotherapy	1.848	0.302	6.347	0.190-211.759
Preoperative radiotherapy	0.807	0.674	2.241	0.052-95.916
Mucinous adenocarcinoma	2.504	0.009	12.230	1.847-80.999
Nerve invasion	1.836	0.012	6.272	1.499-26.247
Tumour height
Upper rectum			Refence
Middle rectum	-0.301	0.837	0.740	0.042-13.001
Lower rectum	5.292	< 0.001	198.820	13.665-2892.686
CEA	0.021	0.390	1.021	0.974-1.070
CA19-9	0.015	0.240	1.015	0.990-1.041
DD	0.013	0.755	1.013	0.934-1.099

TNM: Tumour-node-metastasis; CEA: Carcinoembryonic antigen; DD: D-dimer levels; OR: Odds ratio; CA19-9: Carbohydrate antigen 19-9.