| Value | Category | Cases | |
|---|---|---|---|
| -1000 | Does not apply (SPONTANEOUS) | 69 |
14.6%
|
| -9 | Don’t know (SPONTANEOUS) | 10 |
2.1%
|
| 1 | Not a challenge | 69 |
14.6%
|
| 2 | Minor challenge | 21 |
4.4%
|
| 3 | Moderate challenge | 73 |
15.4%
|
| 4 | Major challenge | 231 |
48.8%
|
| Sysmiss | 198 |