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. Author manuscript; available in PMC: 2020 Sep 1.
Published in final edited form as: J Vasc Surg. 2019 Mar 25;70(3):741–747. doi: 10.1016/j.jvs.2018.11.031

Table 1:

Clinical and Operative Characteristics of the Cohort

Entire Cohort Medicare Eligibility Propensity-Matched Cohort Medicare Eligibility

Variable No
n=175
Yes
n=1,110
p No
n=167
Yes
n=167
p
Demographics

Age mean (SD), y 59.7
(4.0)
76.6
(7.0)
<.001 59.7
(4.1)
75.9
(7.2)
<.001
Male, % 90.9 76.5 <.001 90.4 95.8 .052
White race 78.7 86.1 .095 80.2 82.6 .573
Clinical Characteristics

Coronary Disease 27.4 28.0 .872 27.0 30.5 .468
Coronary Revascularization 14.9 12.3 .327 14.6 13.2 .751
Heart Failure 8.6 11.5 .265 7.2 10.2 .331
COPD 21.4 31.7 .006 21.1 28.3 .127
Smoking History 93.1 78.7 <.001 92.8 88.0 .137
Prior Aortic Surgery 2.3 2.8 .694 2.4 3.6 .521
Positive preoperative stress test 8.5 7.5 .807 8.4 4.8 .186
BMI >35 18.9 8.4 <.001 18 18.0 1
Hypertension 81.0 87.0 .033 80.8 84.4 .386
Diabetes 23.1 21.4 .607 22.3 22.8 .919
Chronic Kidney Disease* 8.6 8.2 .850 7.8 12.8 .137
Preoperative Medications

Aspirin 61.5 61.7 .959 61.7 63.5 .734
P2y12 inhibitor 15.5 19.0 .276 16.2 21.6 .208
Statin 59.2 66.4 .065 59.9 67.7 .139
Operative Characteristics

Urgency
  Elective 77.1 84.8 .013 79 78.4 524
  Urgent 14.3 11.0 14.4 12.0
  Emergent (ruptured) 8.6 4.2 6.6 9.6
AAA Diameter
  <5.5 cm 49.7 47.1 .628 50.9 47.5 .703
  5.5–6.4 cm 28.6 32.2 28.7 28.4
  >=6.5 cm 21.7 20.7 20.4 24.1
Iliac aneurysm 23.8 17.6 .048 22.8 24.6 .699
Conversion to open 0 0.1 .693 0 0.6 .324
*

Creatinine >1.7 milligrams per deciliter.

SD, standard deviation; COPD, chronic obstructive pulmonary disease; BMI, body mass index in kilograms / meter squared; AAA, abdominal aortic aneurysm.