| Value | Category | Cases | |
|---|---|---|---|
| 1 | No - no difficulty | 12120 |
95.9%
|
| 2 | Yes - some difficulty | 362 |
2.9%
|
| 3 | Yes – a lot of difficulty | 137 |
1.1%
|
| 4 | Cannot walk at all | 21 |
0.2%
|
| Sysmiss | 53 |