| Value | Category |
|---|---|
| 1 | Answering machine/service |
| 2 | Contact (no resistance)- general callback |
| 3 | Contact (resistance) by R- Initial refusal by R |
| 4 | Appointment set |
| 5 | Tracking in progress |
| 6 | Contact- resistance/refusal not by R but by someone else |
| 7 | Not contact- no answer, busy signal, dead tone, buzz |
| 8 | |
| 23 | |
| Sysmiss |