| Value | Category | Cases | |
|---|---|---|---|
| 0 | No | 146 |
37%
|
| 1 | Yes: had blood transfusion | 14 |
3.5%
|
| 8 | Don't know | 235 |
59.5%
|
| 9 | 2 | ||
| Sysmiss | 2175 |