Patient selection: age >= 65 years
Parameters:
(1) age
(2) Glasgow coma score (as a measure for the level of consciousness)
(3) duration of the subdural hematoma
(4) management of the hematoma
|
Parameter
|
Finding
|
Points
|
|
age
|
< 80 years of age
|
0
|
|
|
>= 80 years of age
|
1
|
|
Glasgow Coma Score (GCS)
|
>= 8
|
0
|
|
|
<= 7
|
1
|
|
duration of the subdural hematoma
|
acute (<= 3 days)
|
1
|
|
|
subacute (4 - 20 days)
|
1
|
|
|
chronic (>= 21 days)
|
0
|
|
management
|
craniotomy
|
1
|
|
|
other (nonsurgical, burr hole, twist drill)
|
0
|
where:
• The largest odds ratio for mortality was associated with the Glasgow Coma Score (10.4), followed by age (3.7), with the remaining 2 parameters at 2.6-2.7.
• Point assignment could be done based on the relative odds ratio, with 3 or 4 points assigned to GCS and 1 point to the other risk factors..
total number of risk factors =
= SUM(points for all 4 parameters)
Interpretation:
• minimum number of risk factors: 0
• maximum number of risk factors: 4
• The greater the number of risk factors the greater the hospital mortality.
