n, (%) |
217 (35) |
404 (65) |
|
Center volume, median (25–75%), patients/year |
3 (2–4) |
3 (2–5) |
0.96 |
Demographics and Comorbidities
|
|
|
|
Age, mean (95% CI), y |
73 (72–75) |
73 (72–74) |
0.27 |
Women, % |
54 (25) |
73 (18) |
0.05 |
White race, % |
187 (86) |
351 (87) |
0.90 |
Hispanic, % |
12 (6) |
12 (3) |
0.12 |
Hypertension, % |
167 (77) |
298 (74) |
0.33 |
Diabetes, % |
41 (19) |
58 (14) |
0.13 |
Tobacco abuse, % |
160 (74) |
303 (75) |
0.65 |
CAD, % |
60 (28) |
92 (23) |
0.17 |
CHF, % |
28 (13) |
56 (14) |
0.75 |
COPD, % |
61 (28) |
105 (26) |
0.54 |
Pre-op Statin, % |
91 (42) |
155 (38) |
0.51 |
eGFR, mean (95% CI), mL/min/1.73 m2
|
56 (53–59) |
58 (55–60) |
0.51 |
BMI, mean (95% CI), kg/m2
|
29 (28–30) |
28 (28–29) |
0.45 |
Pre-operative domicile |
|
|
0.73 |
Home |
212 (98) |
392 (97) |
|
Nursing home |
5 (2) |
11 (3) |
|
Homeless |
0 |
1 (0) |
|
Previous vascular treatment |
|
|
|
Carotid, %
|
3 (1) |
7 (2) |
0.74 |
Lower extremity, %
|
12 (6) |
15 (4) |
0.29 |
Major amputation, %
|
2 (1) |
1 (0) |
0.25 |
Preoperative characteristics
|
|
|
|
Unfit for open repair, % |
63 (29) |
95 (24) |
0.27 |
Lowest pre-intubation sys BP, mean (95% CI), mm Hg |
95 (91–99) |
95 (92–98) |
0.97 |
Pre-op hemoglobin, mean (95% CI), g/dL |
11.6 (11.3–11.9) |
11.5 (11.3–11.7) |
0.68 |
Mental status, % |
|
|
0.79 |
Normal |
161 (75) |
308 (77) |
|
Disoriented |
35 (16) |
57 (14) |
|
Unconscious |
20 (9) |
36 (9) |
|
Preoperative cardiac arrest, % |
21 (10) |
26 (7) |
0.15 |
Pre-op anticoagulation, % |
21 (10) |
60 (15) |
0.08 |
Previous infrarenal aortic surgery, % |
9 (4) |
23 (6) |
0.40 |
AAA max AP diameter, mean (95% CI), mm |
76 (73–79) |
72 (70–74) |
0.01 |
Neck length, median (25–75%), mm |
15 (10–25) |
24 (18–30) |
<0.001
|
Neck diameter, mean (95% CI), mm |
24 (23–25) |
24 (24–25) |
0.51 |
Infrarenal neck angle, degrees |
|
|
<0.001
|
<45
|
120 (55) |
323 (80) |
|
45–60
|
28 (13) |
81 (20) |
|
61–75
|
46 (21) |
0 |
|
76–90
|
14 (6) |
0 |
|
>91
|
9 (4) |
0 |
|