| Value | Category | Cases | |
|---|---|---|---|
| 1 | Blood | 9 |
9.8%
|
| 2 | Mucous | 22 |
23.9%
|
| 3 | Both | 17 |
18.5%
|
| 4 | Neither | 44 |
47.8%
|
| Sysmiss | 5 |