| Value | Category | Cases | |
|---|---|---|---|
| 1 | a. Within 1 week | 67 |
49.6%
|
| 2 | b. Within 1 month | 60 |
44.4%
|
| 3 | c. Within 3 months | 6 |
4.4%
|
| 4 | d. Within 6 months | 1 |
0.7%
|
| 5 | e. Within 1 year | 1 |
0.7%
|
| Sysmiss | 4371 |