| Value | Category | Cases | |
|---|---|---|---|
| 0 | Undefined | 1 |
25%
|
| 1 | General | 1 |
25%
|
| 2 | Spinal block | 0 |
0%
|
| 3 | Nerve block | 0 |
0%
|
| 4 | Local | 1 |
25%
|
| 9 | Unknown | 1 |
25%
|
| Sysmiss | 5749 |