| Value | Category |
|---|---|
| -9 | Don't know |
| -8 | Refusal |
| -5 | Not applicable |
| -3 | Missing |
| 1 | Too busy |
| 2 | Not interested/waste of time |
| 3 | Questionnaire too personal/too intrusive |
| 4 | Don't trust surveys |
| 5 | Never do surveys |
| 6 | Too old |
| 7 | Other (Specify) |
| 8 | Sickness/ recent death/ recent childbirth |
| 9 | It took too long last time |
| Sysmiss |