| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 3447 |
53.9%
|
| 2 | SOME DIFFICULTY | 226 |
3.5%
|
| 3 | A LOT OF DIFFICULTY | 28 |
0.4%
|
| 4 | CANNOT WALK AT ALL | 7 |
0.1%
|
| 9 | NO RESPONSE | 8 |
0.1%
|
| Sysmiss | 2678 |
41.9%
|