| Value | Category | Cases | |
|---|---|---|---|
| -98 | Don’t know what that symptom / illness is | 0 | |
| 0 | No | 17839 |
98.6%
|
| 1 | Yes | 253 |
1.4%
|
| a | Don't know | 0 | |
| b | Refused to answer | 0 | |
| c | Outlier set to missing | 0 | |
| d | Dropped during anonymization (available on request) | 0 | |
| e | Skipped in error | 0 | |
| m | Not available in wave | 0 | |
| z | Not applicable | 0 |