| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 26 |
2.6%
|
| 1 | Negatively affected | 145 |
14.5%
|
| 2 | Positively affected | 188 |
18.8%
|
| 3 | No effect | 642 |
64.1%
|