| Value | Category | Cases | |
|---|---|---|---|
| 1 | Within 1 month or less | 4 |
50%
|
| 2 | In more than 1 month to 3 month | 4 |
50%
|
| 3 | In more than 3 month | 0 |
0%
|
| 9 | Unspecified | 0 |
0%
|
| Sysmiss | 9991 |