| Value | Category |
|---|---|
| 1 | Variable working hours (for example, shift work, beginning of seasonal work) |
| 2 | Performance involuntary overtime work (paid or unpaid) (for example, growing up work size) |
| 3 | Voluntary overtime (e.g. wanted to earn some extra, wanted to get some extra free days or hours etc.) |
| 4 | Other reason. Specify |
| Sysmiss |