| Length of working hours |
|
| Weekly working hours (h) |
Average weekly (from Monday 00:00 to Sunday 24:00) working hours during the year. Calendar weeks with no work, i.e. paid or non-paid leave, were excluded |
| % of long (> 40 h) working weeks |
Proportion (%) of long working weeks: proportion of calendar weeks of > 40 weekly hours of all calendar weeks of work during the year |
| % of long (> 48 h) working weeks |
Proportion (%) of long working weeks: proportion of calendar weeks of > 48 weekly hours of all calendar weeks of work during the year |
| Shift length (h) |
Average length of all shifts during the year in hours |
| Shift intensity |
|
| Number of consecutive working days |
Average number of consecutive daily work shifts (with no days off) during the year (starting from and ending on a day off or other absence from work) |
| % of long spells of work shifts |
Proportion (%) of > 6 consecutive daily work shifts (without days off)/all spells of consecutive daily work shifts) |
| Number of consecutive night shifts |
Average number of consecutive night shifts during the year (participants with no night shifts were excluded) |
| % of long spells of consecutive night shifts |
Proportion (%) of > 4 consecutive night shift spells during the year of all spells of consecutive daily night shifts |
| Recovery |
|
| Time between shifts (h) |
Average time between work shifts (h) during the year (time between shift and day off or other absence were excluded) |
| % of short shift intervals |
Proportion (%) of shift intervals of ≤11 h during the year of all shift intervals |
| % of short recovery periods after last night shift |
Proportion (%) of < 28 h recovery periods after last night shift during the year of all recovery periods after last night shift |
| Social aspects of working hours |
|
| % of annual leave days |
Proportion (%) of annual leave days of annual contract days |
| % of weekend work |
Proportion (%) of Saturday and/or Sunday work of all weekends |
| % of single days off |
Proportion (%) of single days off of all days off |
| Variability of shift starting times |
The mean absolute deviation (MAD) of shift starting times. MAD is the average distance of the dataset from its mean, calculated as the mean of the absolute deviations from the data’s mean32)
|
| % of realized shift plans |
Proportion (%) of all realized annual shifts of all planned shifts (based on comparison of planned and realized shift plans) |
| % of preferred shifts |
Proportion (%) of preferred shifts of all shifts |
| % of realized shift preferences |
Proportion (%) of realized shift preferences of all shifts |
