| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 1 |
0%
|
| 1 | Much Worse | 6 |
0.3%
|
| 2 | Worse | 21 |
0.9%
|
| 3 | Have no effect | 122 |
5.1%
|
| 4 | Better | 300 |
12.5%
|
| 5 | Much Better | 132 |
5.5%
|
| 9 | Haven't had a chance to hear/Don't know | 780 |
32.5%
|
| 98 | Refused | 0 |
0%
|
| 99 | Not Applicable | 1038 |
43.3%
|