| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. Positive | 0 |
0%
|
| 2 | 2. Negative | 19 |
76%
|
| 7 | 7. Not applicable | 5 |
20%
|
| 8 | 8. Refuse to answer | 1 |
4%
|
| Sysmiss | 74 |