Table 2. Means and Standard Deviations (SD) of Short Form Scores, Number of items in Short Forms, Cronbach’s Alpha (α), group level reliability, and Intraclass Correlation Coefficients (ICC) between the Short Form and the Full Item Bank Scores by Level of Injury.
| Domain (Items in Full Bank) |
N | Mean | SD | Number of Items in Short Form |
Group Level Reliability |
α | ICC(95% CI) |
|---|---|---|---|---|---|---|---|
|
Basic Mobility
(54) |
|||||||
| Tetraplegia | 465 | 46 | 10 | 11 | 0.87 | 0.95 | 0.97(0.96,0.97) |
| Paraplegia | 389 | 55 | 6 | 11 | 0.94 | 0.89 | 0.93(0.91,0.94) |
| Self-care (90) | |||||||
| Tetraplegia | 463 | 44 | 12 | 11 | 0.85 | 0.94 | 0.91(0.90,0.93) |
| Paraplegia | 387 | 56 | 5 | 10 | 0.96 | 0.94 | 0.90(0.87,0.92) |
| Fine Motor (36) | |||||||
| Tetraplegia | 462 | 43 | 8 | 10 | 0.92 | 0.95 | 0.98(0.97,0.98) |
| Paraplegia | 387 | 57 | 5 | 11 | 0.89 | 0.90 | 0.96(0.95,0.97) |
|
Ambulation
(39) |
|||||||
| Tetraplegia | 119 | 65 | 7 | 11 | 0.93 | 0.95 | 0.95(0.93,0.96) |
| Paraplegia | 109 | 65 | 7 | 11 | 0.93 | 0.95 | 0.96(0.95,0.97) |
|
Manual
Wheelchair (56*) |
|||||||
| Tetraplegia | 150 | 48 | 8 | 10 | 0.88 | 0.92 | 0.93(0.90,0.95) |
| Paraplegia | 285 | 57 | 6 | 10 | 0.88 | 0.86 | 0.92(0.90,0.94) |
|
Power
Wheelchair (56*) |
|||||||
| Tetraplegia | 288 | 42 | 10 | 10 | 0.87 | 0.85 | 0.99(0.99,0.99) |
| Paraplegia | 67 | 53 | 8 | 10 | 0.89 | 0.88 | 0.99(0.98,0.99) |
*
The Manual and Power Wheelchair short form items were drawn from the same wheelchair item bank.