Bobeff et al reported a score for predicting short-term outcome for an older adult with traumatic brain injury (TBI). The authors are from the Medical University of Lodz in Poland.
Patient selection: older adult >- 65 years of age with traumatic brain injury
Outcome: 30 day mortality or vegetative state
Parameters:
(1) motor component of the Glasgow Coma Scale, from 1 to 6
(2) comorbidity (cardiac, pulmonary, renal dysfunction, malignancy)
(3) platelet count in 10^9/L
(4) RDW-CV in percent
points for motor component of GCS =
= 12 - (2 * mGCS))
|
Parameter
|
Finding
|
Points
|
|
comorbidity
|
no
|
0
|
|
|
yes
|
1.2
|
|
platelet count
|
> 100 * 10^9/L
|
0
|
|
|
<= 100 *10^9/L
|
2.9
|
|
RDW-CV
|
< 14.5%
|
0
|
|
|
>= 14.5%
|
1.1
|
total score =
= SUSM(points for all of the parameters)
Interpretation:
• minimum score: 0
• maximum score: 15.2
value of X =
= (0.9032 * (score)) - 3.647
probability of poor outcome =
= 1 / ( 1 + EXP((-1) * X))
Performance:
• The area under the ROC curve is 0.89.
