| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 22857 |
85.4%
|
| 2 | SOME DIFFICULTY | 3236 |
12.1%
|
| 3 | A LOT OF DIFFICULTY | 605 |
2.3%
|
| 4 | CANNOT WALK AT ALL | 51 |
0.2%
|
| 9 | NO RESPONSE | 3 |
0%
|
| Sysmiss | 4308 |