| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 3538 |
64.2%
|
| 2 | SOME DIFFICULTY | 420 |
7.6%
|
| 3 | A LOT OF DIFFICULTY | 80 |
1.5%
|
| 4 | CANNOT WALK/CLIMB STEPS AT ALL | 5 |
0.1%
|
| Sysmiss | 1470 |
26.7%
|