| Value | Category | Cases | |
|---|---|---|---|
| 1 | Yes | 299 |
14%
|
| 2 | No | 311 |
14.5%
|
| 3 | Unknown | 585 |
27.3%
|
| 4 | Known positive | 948 |
44.2%
|
| Sysmiss | 408 |