| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 14623 |
89.9%
|
| 2 | SOME DIFFICULTY | 1091 |
6.7%
|
| 3 | A LOT OF DIFFICULTY | 453 |
2.8%
|
| 4 | CANNOT WALK 500 M AT ALL | 73 |
0.4%
|
| 9 | NO RESPONSE | 25 |
0.2%
|
| Sysmiss | 1279 |