| Value | Category | Cases | |
|---|---|---|---|
| -9 | do not know | 0 |
0%
|
| -7 | does not apply | 0 |
0%
|
| 0 | no obstacle | 31 |
20.9%
|
| 1 | minor obstacle | 26 |
17.6%
|
| 2 | moderate obstacle | 47 |
31.8%
|
| 3 | major obstacle | 37 |
25%
|
| 4 | very severe obstacle | 7 |
4.7%
|