| Value | Category | Cases | |
|---|---|---|---|
| 1 | a. Within 1 week | 62 |
26.4%
|
| 2 | b. Within 1 month | 128 |
54.5%
|
| 3 | c. Within 3 months | 30 |
12.8%
|
| 4 | d. Within 6 months | 6 |
2.6%
|
| 5 | e. Within 1 year | 9 |
3.8%
|
| Sysmiss | 4271 |