Table 2 Demographic information of the study cohort. There were no statistically significant differences between the two randomized groups in terms of the various clinical parameters. Results are presented as percentage with 95% confidence interval. H&H Hunt and Hess, SOFA sequential organ failure assessment score, HTN hypertension, DM diabetes mellitus, CKD chronic kidney disease

Age

53.4 + 13.4

53.2 + 14.1

56.3 + 13.4

51.4 + 13.7

Gender (% female)

76.3% [64.3–85.7]

59.2% [40.6–76.1]

80% [55.6–94]

100%

H&H 1–2

44.1% [31.2–57.6]

66.7% [46.0–83.5]

20.0% [6.0–44.4]

29.4% [12.2–53.0]

H&H 3

39.0% [26.5–52.6]

29.6% [15.1–48.2]

66.7% [41.6–86.0]

29.4% [12.2–53.0]

H&H 4

15.3% [7.8–26.0]

3.7% [0.4–16.0]

13.3% [2.9–36.3]

35.3% [16.3–58.9]

H&H 5

1.7% [0.2–7.6]

0%

5.9% [0.6–24.4]

GCS on admit (median + IQR)

14 [11–15]

15 [13.5–15]

14 [7–15]

13 [7–15]

SOFA score on admit (median ± IQR)

1 [0–3]

1 [0–2]

2 [1–4.5]

2 [1–3]

HTN

47.5% [34.3–60.9]

40.7% [23.9–59.4]

53.3% [29.4–76.1]

52.9% [30.3–74.6]

CAD

6.8% [1.9–16.5]

3.7% [0.4–16.0]

13.3% [2.9–36.3]

5.9% [0.6–24.4]

DM

11.9% [4.9–22.9]

11.1% [3.2–26.8]

13.3% [2.9–36.3]

11.8% [2.5–32.7]

Smoker

47.5% [34.3–60.9]

55.6% [37.1–72.9]

40.0% [18.8–64.7]

41.2% [20.7–64.4]

CKD

1.7% [0.0–9.1]

0%

6.7% [0.7–27.2]

0%

EtOH abuse

10.2% [3.8–20.8]

14.8% [5.2–31.5]

6.7% [0.7–27.2]

5.9% [0.6–24.4]

Illicit drug use

25.4% [15.0–38.4]

29.6% [15.1–48.2]

6.7% [0.7–27.2]

35.3% [16.3–58.9]

First creatinine (mean ± SD)

0.80 + 0.31

0.82 + 0.27

0.79 + 0.26

0.76 + 0.42

Surgical approach to the aneurysm (% treated with endovascular approach)

69.5% [57..0–80.1]

81.5% [64.1–92.6]

66.7% [41.6–86.0]

52.9% [30.3–74.6]