| Value | Category | Cases | |
|---|---|---|---|
| -9 | NIU (not in universe) | 326 |
73.9%
|
| 1 | vaginal | 37 |
8.4%
|
| 2 | c-section | 3 |
0.7%
|
| 3 | forceps | 1 |
0.2%
|
| 4 | vacuum | 0 |
0%
|
| 96 | other | 0 |
0%
|
| 98 | don't know | 0 |
0%
|
| 9999995 | missing:impute | 74 |
16.8%
|