| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know | 22 |
4.6%
|
| -7 | Does not apply | 1 |
0.2%
|
| 0 | No Obstacle | 167 |
34.6%
|
| 1 | Minor Obstacle | 74 |
15.4%
|
| 2 | Moderate Obstacle | 92 |
19.1%
|
| 3 | Major Obstacle | 76 |
15.8%
|
| 4 | Very Severe Obstacle | 50 |
10.4%
|