| Value | Category |
|---|---|
| 1 | Minimal depression |
| 2 | Mild depression |
| 3 | Moderate depression |
| 4 | Moderately severe depression |
| 5 | Severe depression |
| a | Don't know |
| b | Refused to answer |
| c | Outlier set to missing |
| d | Dropped during anonymization (available on request) |
| e | Skipped in error |
| z | Not applicable |