| Value | Category | Cases | |
|---|---|---|---|
| -9 | do not know | 1 |
0.4%
|
| -7 | does not apply | 3 |
1.2%
|
| 0 | no obstacle | 172 |
71.4%
|
| 1 | minor obstacle | 33 |
13.7%
|
| 2 | moderate obstacle | 16 |
6.6%
|
| 3 | major obstacle | 11 |
4.6%
|
| 4 | very severe obstacle | 5 |
2.1%
|