Models of Chen et al for a Patient with Abdominal Aortic Aneurysm (Vancouver Scores): Mortality Associated with a Ruptured Aneurysm Based on Preoperative Findings
Chen et al reported several models for describing mortality associated with various states of abdominal aortic aneurysms. One model reports mortality for a patient with a ruptured aneurysm based on preoperative findings. The authors are from the University of British Columbia in Vancouver.
Patient selection: ruptured aortic aneurysm, prior to surgery
Parameters from stepwise logistic regression analysis:
(1) level of consciousness
(2) age in years
(3) cardiac arrest
Parameter
Findings
Points
level of consciousness
unconscious
1.14
conscious
-1.14
age in years
0.062 * (age)
cardiac arrest
Yes
0.60
No
-0.60
X =
= SUM(points for all of the parameters) - 3.44
probability of mortality =
= 1 / (1 + EXP((-1) * X))
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