Patient selection: age >= 18 years, spinal cord injury
Outcome: independent walking (FIM score 6 or 7 AND locomotion walking or both walking and wheelchair used) >= 12 months after injury
Parameters:
(1) age in years
(2) motor score L3 (from 0 to 5)
(3) motor score S1 (from 0 to 5)
(4) light touch score L3 (0 to 2)
(5) light touch score S1 (0 to 2)
|
Parameter
|
Finding
|
Points
|
|
age in years
|
< 65 years
|
0
|
|
|
>= 65 years
|
-10
|
|
motor score L3
|
|
2 * (motor score)
|
|
motor score S1
|
|
2 * (motor score)
|
|
light touch L3
|
|
5 * (touch score)
|
|
light touch S1
|
|
5 * (touch score)
|
The authors state "the best (highest of right or left side) motor and light touch sensory scores were used for computing the new prediction rule." Option 1 is to measure each on left and right side, then take higher. Option 2 is to determine which side has better function and to score that side. Option 1 used in implementation.
The timing of the neurologic exam appears to be the first 15 days post injury (page 1385).
full score =
= SUM(points for all 5 parameters)
abbreviated score =
= (points for age) + (points for motor at L3) + (points for sensory at L3)
Interpretation:
• minimum scores: -10
• maximum full score: 40
• maximum abbreviated score: 20
X =
= (0.125 * (full score)) - 1.763
Y =
= (0.211 * (abbreviated score)) - 1.425
probability of independent walking =
= 1 / (1 + EXP((-1) * (X))
= 1 / (1 + EXP((-1) * (Y))
Performance:
• The area under the ROC curve was 0.87 for the full score.
