| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 4 |
0.7%
|
| -7 | Does not apply | 8 |
1.4%
|
| 0 | No obstacle | 329 |
56.7%
|
| 1 | Minor obstacle | 68 |
11.7%
|
| 2 | Moderate obstacle | 63 |
10.9%
|
| 3 | Major obstacle | 87 |
15%
|
| 4 | Very severe obstacle | 21 |
3.6%
|
| Sysmiss | 1 |