| Value | Category | Cases | |
|---|---|---|---|
| 1 | positive | 0 |
0%
|
| 2 | negative | 40 |
97.6%
|
| 3 | not present | 1 |
2.4%
|
| 4 | refused | 0 |
0%
|
| 5 | other | 0 |
0%
|
| Sysmiss | 12908 |