| Value | Category | Cases | |
|---|---|---|---|
| 1 | Probably induced | 36 |
10.4%
|
| 2 | Possibly induced | 23 |
6.6%
|
| 3 | Most likely spontaneous | 279 |
80.4%
|
| 98 | Don't know | 9 |
2.6%
|
| 99 | Refused | 0 |
0%
|
| Sysmiss | 57 |