| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 6602 |
85.4%
|
| 2 | SOME DIFFICULTY | 330 |
4.3%
|
| 3 | A LOT OF DIFFICULTY | 35 |
0.5%
|
| 4 | CANNOT WALK/CLIMB STEPS AT ALL | 2 |
0%
|
| 9 | NO RESPONSE | 4 |
0.1%
|
| Sysmiss | 759 |
9.8%
|