Maas et al reported a score for predicting mortality in a patient with traumatic brain injury (TBI) based on findings seen on the brain CT scan. The authors are from Erasmus Medical Center in Rotterdam.
Patient selection: brain CT
Parameters:
(1) baseline cisterns
(2) midline shift in mm
(3) epidural mass lesion
(4) intraventricular blood or subarachnoid hemorrhage
Parameter
Finding
Points
basal cisterns
normal
0
compressed
1
absent
2
midline shift
none
0
<= 5 mm
0
> 5 mm
1
epidural mass lesion
absent
1
present
0
hemorrhage
intraventricular blood
1
subarachnoid hemorrhage
1
both
1
neither
0
score =
= SUM(points for all of the parameters) + 1
Interpretation:
• minimum score: 1
• maximum score: 6
value of X =
= (0.8 * (score)) - 2.60
probability of 6-month mortality =
= 1 / (1 + EXP((-1) * X))
Performance:
• The area under the ROC curve is 0.77.
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