| Value | Category | 
|---|---|
| 0 | |
| 1 | HH surveyed in the 1st visit is surveyed in 2nd visit | 
| 2 | HH surveyed in 1st visit is substituted by another HH in 2nd visit | 
| 3 | Casualty in 2nd visit | 
| 4 | Casualty in 1st visit but the orig. selected hh in 1st visit surveyed in 2nd visit | 
| Sysmiss |