Table 1.

Patient and operation characteristics in cases and controls group

	Cases (AL) (n=45), n (%)	Controls (no AL) (n=116), n (%)	P
Gender
Male	30 (67)	73 (63)	0.47
Female	15 (33)	43 (37)
Mean age (years)	65±13	65±12.7	NA
Nutritional status
Mean BMI	25.8±3.4	25.6±6.3	0.76
Mean preoperative albumin	32±8.3	32±7.4	0.93
Pathology
Cancer	23 (51.1)	69 (59.5)	NA
Surgery characteristics
Urgent surgery	2 (9)	13 (11.2)	0.15
Left sided	10 (22.2)	26 (22.4)	NA
Colorectal anastomosis	35 (77.7)	90 (77.5)
Stapled	28 (62.2)	68 (58.6)	0.57
Hand sutured	17 (37.7)	48 (41.4)
Associated procedure	6 (13.3)	24 (20.7)	0.26
No associated procedure	39 (86.6)	92 (79.3)
Comorbidities
Hypertension requiring medication	22 (48.8)	46 (39.6)	0.26
Smoking in the past year	14 (31.1)	30 (25.8)	0.41
Diabetes	9 (20)	19 (16.3)	0.36
CV risk factor*	31 (68.8)	82 (70.7)	0.92
History of CV event†	9 (20)	20 (17.2)	0.69
AAC
Mean of AAC rate (%)‡	4.4±5.5	2.4±5.2	0.03
AAC rate ≥5%	22 (49)	34 (29.3)	0.01

*CV disease risk factors=Patients with current dialysis, congestive heart failure, cerebrovascular accident, transient ischemic attack, peripheral vascular disease, preoperative myocardial infarction, angina, previous percutaneous transluminal coronary angioplasty, previous ischemic colitis, hypertension requiring medication, diabetes, smoking in the past year; ^†History of CV disease=Cerebrovascular accident, transient ischemic attack, peripheral vascular disease, preoperative myocardial infarction, angina, previous percutaneous transluminal coronary angioplasty, or previous cardiac surgery; ^‡Using LN (%+1). Continuous variables are expressed as mean±SD; categorical variables are expressed as n (%). SD=Standard deviation; AL=Anastomotic leakage; NA=Not analysed; CV=Cardiovascular; AAC=Abdominal aortic calcification; BMI=Body mass index