| Value | Category | Cases | |
|---|---|---|---|
| -9 | do not know | 14 |
5.8%
|
| -7 | does not apply | 3 |
1.2%
|
| 0 | no obstacle | 167 |
69.3%
|
| 1 | minor obstacle | 12 |
5%
|
| 2 | moderate obstacle | 5 |
2.1%
|
| 3 | major obstacle | 19 |
7.9%
|
| 4 | very severe obstacle | 21 |
8.7%
|