| Value | Category | Cases | |
|---|---|---|---|
| -9 | do not know | 9 |
3.7%
|
| -7 | does not apply | 1 |
0.4%
|
| 0 | no obstacle | 115 |
47.7%
|
| 1 | minor obstacle | 51 |
21.2%
|
| 2 | moderate obstacle | 30 |
12.4%
|
| 3 | major obstacle | 23 |
9.5%
|
| 4 | very severe obstacle | 12 |
5%
|