Nomogram Prediction of Anastomotic Leakage and Determination of an Effective Surgical Strategy for Reducing Anastomotic Leakage after Laparoscopic Rectal Cancer Surgery

Table 2

Multivariate analysis of risk factors associated with anastomotic leakage.

Variables	Relative risk	95% CI
Sex
Male	1
Female	0.272	0.129–0.526	<0.001
ASA score
1/2	1
3	3.818	1.587–8.622	0.002
Location of tumor
Upper	1
Mid	1.757	0.913–3.331	0.085
Low	3.721	1.761–7.635	<0.001
Operative time (min)	1.343	1.082–1.668	0.008
Transfusion
No	1
Yes	3.495	1.624–7.172	<0.001

ASA: American Society of Anesthesiologists; CI: confidence interval.