| Value | Category | Cases | |
|---|---|---|---|
| -9 | do not know | 2 |
0.8%
|
| -7 | does not apply | 1 |
0.4%
|
| 0 | no obstacle | 60 |
24.9%
|
| 1 | minor obstacle | 49 |
20.3%
|
| 2 | moderate obstacle | 57 |
23.7%
|
| 3 | major obstacle | 53 |
22%
|
| 4 | very severe obstacle | 19 |
7.9%
|