| Value | Category | Cases | |
|---|---|---|---|
| 1 | No difficulty | 3477 |
89.9%
|
| 2 | Some difficulty | 291 |
7.5%
|
| 3 | A lot of difficulty | 40 |
1%
|
| 4 | Cannot walk 500 m at all | 23 |
0.6%
|
| 9 | No response | 36 |
0.9%
|
| Sysmiss | 462 |