| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know | 27 |
5.6%
|
| -7 | Does not apply | 39 |
8.1%
|
| 0 | No Obstacle | 256 |
53.1%
|
| 1 | Minor Obstacle | 72 |
14.9%
|
| 2 | Moderate Obstacle | 47 |
9.8%
|
| 3 | Major Obstacle | 28 |
5.8%
|
| 4 | Very Severe Obstacle | 13 |
2.7%
|