Table 2.

Variable assignment

Factor	Assignment
Age	≥61=1, <61=0
BMI	<20=1, ≥20=0
Hemoglobin after operation (g/L)	<107=1, ≥107=0
Comorbid diabetics	Yes =1, None =0
Comorbid hypertension	Yes =1, None =0
Total cholesterol (mmol/L)	≥4.6=1, <4.6=0
HDL-C (mmol/L)	<1.5=1, ≥1.5=0
LDL-C (mmol/L)	≥3.2=1, <3.2=0
Postoperative anastomotic leakage	Yes =1, None =0

Notes: BMI: Body mass index; TC: Total cholesterol; HDL-C: High-density lipoprotein cholesterol; LDL-C: Low-density lipoprotein cholesterol.