| Value | Category | Cases | |
|---|---|---|---|
| 0 | Negative | 114 |
92.7%
|
| 1 | Positive | 8 |
6.5%
|
| 2 | Refuse to answer | 0 |
0%
|
| 8 | Unknown | 1 |
0.8%
|
| 9 | Missing | 0 | |
| Sysmiss | 590 |