| Value | Category | Cases | |
|---|---|---|---|
| 0 | Negative | 7 |
70%
|
| 1 | Positive | 3 |
30%
|
| 2 | Doubtful | 0 |
0%
|
| 3 | Refused to answer | 0 |
0%
|
| 4 | Indeterminate | 0 |
0%
|
| 7 | Not applicable | 0 |
0%
|
| 8 | Unknown | 0 |
0%
|
| 9 | Missing | 1995 | |
| Sysmiss | 10906 |