| Value | Category | Cases | |
|---|---|---|---|
| 1 | Suddenly | 449 |
72.5%
|
| 2 | Fast (within a day) | 91 |
14.7%
|
| 3 | Slowly (over many days) | 39 |
6.3%
|
| 8 | Don't know | 40 |
6.5%
|
| 9 | 43 | ||
| Sysmiss | 3541 |