Overview of workplace factors
| Main factor | Factors | Measurement |
| Employment characteristics | Working hours | Continuous*: number of hours during a typical day |
| Work schedule | Categorical*: day job, no weekends; day job with weekends; evening job; night job; shift work | |
| Job position | Categorical*: worker; supervisor | |
| Job size | Categorical*: part-time; full-time | |
| Income | Continuous*: gross annual household income in 100 000 NOK | |
| Job demands and support factors | Psychological job demands | JCQ: mean score of five items |
| Job control | JCQ: mean score of nine items | |
| Workplace social support | JCQ: mean score of eight items | |
| Supervisors’ leadership qualities | 7LQQ: mean score of seven items | |
| Travels and worksite factors | Job travels | Categorical*: no; yes |
| Working from home | Categorical*: no; yes | |
| Working from holiday home | Categorical*: no; yes | |
| Workplace drinking social norms | Drinking social norms | DNS: mean score of four items |
*Self-developed measure.
DNS, Drinking Norms Scale; JCQ, Job Content Questionnaire; 7LQQ, Seven-item Leadership Qualities Questionnaire; NOK, Norwegian kroner.