| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 7 |
4.6%
|
| 1 | One month or less | 7 |
4.6%
|
| 2 | 2 |
1.3%
|
|
| 3 | 9 |
6%
|
|
| 4 | 1 |
0.7%
|
|
| 5 | 3 |
2%
|
|
| 6 | 14 |
9.3%
|
|
| 7 | 1 |
0.7%
|
|
| 8 | 5 |
3.3%
|
|
| 9 | 1 |
0.7%
|
|
| 12 | 17 |
11.3%
|
|
| NA | 84 |
55.6%
|