Table 2.

Key measures and timing of assessment

	Baseline	6-month follow-up
Primary outcome
From hospital register
Sickness absence	X	X
Secondary outcomes
Self-reported questionnaires
The Bergen Insomnia Scale	X	X
Shift work disorder	X	X
The Swedish Occupational Fatigue Inventory	X	X
The revised Circadian Type Inventory	X
The Horne-Östberg Morningness Eveningness Questionnaire	X
The Hopkins Symptom Checklist-5	X	X
Job Satisfaction Index	X	X
The Work-Family Interface Scale	X	X
Work-related negative incidents	X	X
The Turnover Intention Scale	X	X
The Utrecht Work Engagement Scale-9	X	X
Subjective Health Complaints inventory (three of five subscales)	X	X
Recovery Experience Questionnaire (two of four dimensions)	X	X
Epworth Sleepiness Scale	X	X
Sleep monitoring study (≈50)
Sleep diary (≥7 days)	X	X
Xethru sensor (≥7 days)	X	X
Additional measures
Self-reported questionnaires
Unwanted/negative effects		X
Self-rostering	X	X
Experience of the implementation of the intervention		X
Physical activity	X	X
Commute time	X
Sleep duration and perceived need for sleep	X	X
Use of sleep medication and light treatment	X	X
Satisfaction with work schedule	X	X
Preferred presence of quick return in work schedule	X	X
Demographics and background information
From hospital register
Sex	X
Age	X
Percentage of full-time equivalent	X	X
Payroll data	X	X
Self-reported questionnaires
Marital status	X
Highest completed degree	X
Years of experience with shift work	X
Children living at home	X