| Value | Category | Cases | |
|---|---|---|---|
| 1 | a. Within 1 week | 58 |
34.3%
|
| 2 | b. Within 1 month | 92 |
54.4%
|
| 3 | c. Within 3 months | 17 |
10.1%
|
| 4 | d. Within 6 months | 1 |
0.6%
|
| 5 | e. Within 1 year | 1 |
0.6%
|
| Sysmiss | 4799 |