Hong et al reported 3 models for predicting outcome for a patient with subarachnoid hemorrhage. These include ECG changes as well as conventional scores. The authors are from Yonsei University in South Korea.
Patient selection: adult with subarachnoid hemorrhage
Outcome: poor if Glasgow Outcome Scale 1, 2 or 3.
Parameters:
(1) age in years
(2) Fisher grade, from 1 to 4
(3) ST depression or tall T waves
Parameter
Finding
Points
age
0.0557 * (age)
Fisher grade
1.6794 * (Fisher grade)
ST depression or tall T waves
no
0
yes
3.615
value of X =
= SUM(points for the 3 parameters) - 9.418
probability of poor prognosis at 6 months =
= 1 / (1 + EXP((-1) * X))
Performance:
• The area under the ROC curve is 0.77 on external validation.
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