Table 3.

Univariate analysis for determinants of mortality after aorto-bifemoral bypasses surgery

	nonsurvivors/survivors
Variable	n = 9 n = 66	Odds ratio (95% CI)	P
Type of AFB surgery
for Aneurysmatic disease	4 (44)/23 (35)	1.50 (0.36 - 6.12)	0.575
for occlusive disease	5 (56)/43 (65)	1
Age	73 (67-76)/55 (62-70)	1.15 (1.03 - 1.28)	0.015
Gender		-	0.999
Female	0 (0)/2 (3)
Male	9 (100)/64 (97)
BMI, median	20 (21-29)/24 (21-26)	0.96 (0.74 - 1.24)	0.733
Duration of anaesthesia (min.)	333(330-450)/300 (264-357)	1.01 (1.00 - 1.01)	0.117
ASA Physical status
I/II	1 (11)/25(38)	1
III/IV	8 (89)/41(62)	4.88 (0.58 - 41.36)	0.146
Temperature at admission	34.3(34.0-35.1)/34.5(33.3-35.9)	0.96 (0.61 - 1.50)	0.848
Troponin at admission	0.01(0.01-0.05)/0.02(0.01-0.04)	0.001 (0 - 3500)	0,656
Hypertension	6(67)/49 (74)	0.63 (0.16 - 3.09)	0.631
Hyperlipidemia	4 (44)/33(50)	0.80 (0.20 - 3.25)	0.755
Ischaemic heart disease	3 (33)/29(44)	0.64 (0.15 - 2.77)	0.549
Congestive heart disease	6 (67)/13 (20)	8.15 (1.80 - 37.01)	0.007
Cerebrovascular disease	2 (22)/5(8)	3.49 (0.57 - 21.45)	0.178
Insulin therapy for diabetes	0 (0)/3 (5)	-	0.999
Renal insufficiency	2 (22)/1 (2)	18.57 (1.49 - 231.7)	0.023
RCRI
≤ 2	1(11)/34 (52)	1
>2	8 (89)/32 (49)	8.50 (1.01 - 71.83)	0.049
Previous score in Katz scale	0/0	-	0.999
Previous score in Lawton scale	7 (7-7)/7(4-7)	0.76 (0.48-1.18)	0.215
SAPS II, median	33 (19-60)/18 (13-23)	1.09 (1.04 - 1.14)	0.001
APACHE II	13 (15-25)/8 (6-11)	1.51 (1.17 - 1.83)	0.001
Length of PACU stay (hours)	93 (45-140)/44 (34-66)	1.01 (1.00 - 1.02)	0.066
Length of Hospital stay (days)	9 (8-32)/11(8-27)	1.00 (0.98 - 1.02)	0.990

AFB, aorto-bifemoral bypass surgery; BMI, Body mass index; ASA, American Society of anesthesiologists, COPD, Chronic obstructive pulmonary disease; RCRI, Revised cardiac risk index; PACU, Post Anaesthesia Care Unit, SAPS, Simplified Acute Physiology Score; APACHE II Acute Physiology & Chronic Health Evaluation