| Value | Category | Cases | |
|---|---|---|---|
| 1 | Yes | 64 |
2.7%
|
| 2 | No | 428 |
18%
|
| 3 | Unknown | 835 |
35%
|
| 4 | Known positive | 1056 |
44.3%
|
| Sysmiss | 168 |