| Value | Category | Cases | |
|---|---|---|---|
| 1 | No difficulty | 3756 |
96.1%
|
| 2 | Some difficulty | 111 |
2.8%
|
| 3 | A lot of difficulty | 18 |
0.5%
|
| 4 | Cannot walk 100 m at all | 6 |
0.2%
|
| 9 | No response | 17 |
0.4%
|
| Sysmiss | 421 |