Table 3 Mortality & length of stays between the groups with or without REBOA

Before matching

No REBOA (n = 3151)

REBOA (n = 35)

P-Value

Odds Ratio (95% CI)

Absolute Risk Difference (95% CI)

Mortality before matching, n (%)

552 (17.5)

12 (34.3)

0.018

2.457 [1.215, 4.967]

0.168 [0.111, 0.224]

hospital length of stay, Median (95% CI) [Kaplan–Meier procedure])

13 (12, 13)

22 (12, 44)

0.203

ICU days, median [1st quartile -3rd

quartile]

6 [3–13]

9 [4 – 21.5]

0.151

After Matching

No REBOA (n = 35)

REBOA (n = 35)

Mortality after matching, n (%)

10 (28.6)

12 (34.3)

0.789

1.333 [0.382, 6.483]

0.057 [-0.18, 0.294]

hospital length of stay, Median (95% CI) [Kaplan–Meier procedure])

8 (6, 17)

22 (12, 44)

0.194

ICU days, median [1st quartile -3rd

quartile]

6 [3–18]

9 [4 – 21.5]

0.597

Results from a Multiple Logistic Regression Model

Variables

β coefficient

95% CI for β

OR

95% CI for OR

p value

(Intercept)

0.056

-0.567

0.679

0.8602

group

0.553

-0.218

1.324

1.738

0.804

3.758

0.1597

white

-0.163

-0.382

0.055

0.849

0.682

1.057

0.1426

sexMale

0.035

-0.188

0.259

1.036

0.828

1.296

0.7559

ISS 

0.026

0.017

0.036

1.027

1.018

1.036

 < .0001

GCS

-0.076

-0.097

-0.056

0.927

0.908

0.946

 < .0001

lowest-sbp

-0.034

-0.04

-0.028

0.966

0.961

0.972

 < .0001

laparotomy

0.665

0.441

0.889

1.944

1.554

2.432

 < .0001

>= 5 Units of packed red blood cells (PRBC)

0.609

0.381

0.838

1.839

1.463

2.311

 < .0001

AISPREDOT Analysis

Abdomen

aispredot

No REBOA

(%)

REBOA

(%)

520,202

0

0.0

1

2.9

520,206

0

0.0

1

2.9

520,406

1

2.9

0

0.0

520,602

0

0.0

1

2.9

520,604

2

5.7

4

11.4

520,606

0

0.0

1

2.9

520,608

1

2.9

1

2.9

520,699

1

2.9

3

8.6

521,108

0

0.0

1

2.9

521,206

1

2.9

0

0.0

521,408

2

5.7

0

0.0

540,624

0

0.0

1

2.9

540,640

2

5.7

0

0.0

541,426

1

2.9

1

2.9

541,624

1

2.9

0

0.0

541,626

2

5.7

0

0.0

541,824

0

0.0

2

5.7

541,826

2

5.7

1

2.9

541,828

0

0.0

1

2.9

544,226

0

0.0

1

2.9

544,228

2

5.7

0

0.0

544,240

2

5.7

0

0.0

N/A

15

42.9

15

42.9

Total

35

35

aispdescription

No REBOA

(%)

REBOA

(%)

Aorta, abdominal, intimal tear [includes dissection], no disruption

0

0.0

1

2.9

Aorta, abdominal, laceration; perforation; puncture, minor; superficial; incomplete circumferential involvement; blood loss < = 20% by volume

0

0.0

1

2.9

Bladder (urinary), laceration, extraperitoneal wall > 2 cm; intraperitoneal wall < = 2 cm [OIS III]

0

0.0

1

2.9

Bladder (urinary), rupture

1

2.9

0

0.0

Bladder (urinary), rupture NFS

1

2.9

0

0.0

Celiac artery, laceration; perforation; puncture, minor; superficial; incomplete circumferential involvement; blood loss < = 20% by volume

1

2.9

0

0.0

Iliac artery [common, internal, external] and its named branches [includes gluteal] NFS

0

0.0

2

5.7

Iliac artery [common, internal, external] and its named branches [includes gluteal], laceration; perforation; puncture NFS

1

2.9

3

8.6

Iliac artery [common, internal, external] and its named branches [includes gluteal], laceration; perforation; puncture, minor; superficial; incomplete circumferential involvement; blood loss < = 20% by volume

0

0.0

1

2.9

Iliac artery [common, internal, external] and its named branches injury NFS

1

2.9

1

2.9

Iliac artery [common, internal, external] and its named branches, intimal tear, no disruption

0

0.0

1

2.9

Iliac artery [common, internal, external] and its named branches, laceration; perforation; puncture NFS

1

2.9

1

2.9

Iliac artery [common, internal, external] and its named branches, laceration; perforation; puncture, major; rupture; transection; segmental loss; blood loss > 20% by volume

1

2.9

1

2.9

Jejunum-ileum (small bowel), laceration, massive; avulsion; complex; tissue loss; transection; large areas of tissue devitalization or devascularization [OIS IV, V]

1

2.9

1

2.9

Kidney, laceration, > 1 cm parenchymal depth of renal cortex, no collecting system rupture or urinary extravasation; moderate [OIS III]

1

2.9

0

0.0

Kidney, laceration, parenchymal laceration extending through renal cortex, medulla and collecting system; main renal vessel injury with contained hemorrhage; major [OIS IV]

2

5.7

0

0.0

Liver, laceration, > 3 cm parenchymal depth; major duct involvement; blood loss > 20% by volume; moderate [OIS III]

0

0.0

1

2.9

Liver, laceration, > 3 cm parenchymal depth; major duct involvement; moderate [OIS III]

0

0.0

1

2.9

Liver, laceration, parenchymal disruption < = 75% hepatic lobe; multiple lacerations > 3 cm deep; "burst" injury; major [OIS IV]

1

2.9

0

0.0

Liver, laceration, parenchymal disruption < = 75% of hepatic lobe or < = 3 Couinard's segments within a single lobe; multiple lacerations > 3 cm deep; "burst" injury; major [OIS IV]

1

2.9

1

2.9

Liver, laceration, parenchymal disruption of > 75% of hepatic lobe or > 3 CouinardÂ’s segments within a single lobe; or involving retrohepatic vena cava/central hepatic veins; massive; complex [OIS V]

0

0.0

1

2.9

Other named arteries, abdomen, [e.g. hepatic, renal, splenic], laceration; perforation; puncture, major; rupture; transection; segmental loss; blood loss > 20% by volume

1

2.9

0

0.0

Other named arteries, abdomen, [e.g., hepatic, renal, splenic], laceration; perforation; puncture, major; rupture; transection; segmental loss; blood loss > 20% by volume

1

2.9

0

0.0

Spleen, laceration, hilar disruption producing total devascularization; tissue loss; avulsion; massive [OIS V]

1

2.9

0

0.0

Spleen, laceration, hilar disruption producing total devascularization; tissue loss; avulsion; massive; completely shattered spleen [OIS V]

1

2.9

0

0.0

Spleen, laceration, involving segmental or hilar vessels producing major devascularization of > 25% of spleen but no hilar injury; major (OIS IV)

0

0.0

1

2.9

Spleen, rupture NFS

2

5.7

0

0.0

Superior mesenteric artery, laceration; perforation; puncture, major; rupture; transection; segmental loss; blood loss > 20% by volume

0

0.0

1

2.9

Vena Cava, inferior, laceration; perforation; puncture, major; rupture; transection; segmental loss; blood loss > 20% by volume

1

2.9

0

0.0

N/A

15

42.9

15

42.9

Total

35

35