| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | One month or less | 15 |
23.1%
|
| 2 | 6 |
9.2%
|
|
| 3 | 13 |
20%
|
|
| 4 | 5 |
7.7%
|
|
| 5 | 1 |
1.5%
|
|
| 6 | 19 |
29.2%
|
|
| 8 | 1 |
1.5%
|
|
| 9 | 1 |
1.5%
|
|
| 12 | 4 |
6.2%
|
|
| Sysmiss | 83 |