Risselada et al developed an equation for predicting 60-day mortality following subarachnoid hemorrhage from a ruptured intracranial aneurysm. The authors are from multiple hospitals in Europe.
Patient selection: ruptured aneurysm with subarachnoid hemorrhage
Outcome: 60-day mortality
Parameters:
(1) age in years in decades
(2) Fisher grade
(3) World Dederation of Neurological Societies (WFNS) grade
(4) luminal diameter of the aneurysm in mm
Parameter
Finding
Points
age in years
(0.2762 * (age) / 10)
Fisher
Grade I
0
Grade II
0.3572
Grade III
0.9756
Grade IV
1.008
WFNS
Grade 1
0
Grade 2
0.6216
Grade 3
0.5261
Grade 4
1.574
Grade 5
1.934
not assessed
1.738
size
(0.07662 * (size))
X =
= SUM(points for all 4 parameters) - 5.812
probability of 60-day mortality =
= 1 / (1 + EXP((-1) * X))
Performance:
• The area under the ROC curve is 0.70.
To read more or access our algorithms and calculators, please log in or register.
