| Value | Category | Cases | |
|---|---|---|---|
| -9 | do not know | 1 |
0.7%
|
| -7 | does not apply | 2 |
1.4%
|
| 0 | no obstacle | 50 |
33.8%
|
| 1 | minor obstacle | 34 |
23%
|
| 2 | moderate obstacle | 36 |
24.3%
|
| 3 | major obstacle | 19 |
12.8%
|
| 4 | very severe obstacle | 6 |
4.1%
|