| All (n = 1200) | Group A (n = 300) | Group B (n = 160) |
---|---|---|---|
Baseline | Â | Â | Â |
Questionnaire | x | x | x |
Aerobic fitness | Â | x | x |
Muscular strength | Â | Â | x |
Physical examination | Â | x | x |
Exposure measurement – light setup (4–5 days) |  | x | x |
Exposure measurement – full setup (8 hours) |  |  | x |
Follow-up | Â | Â | Â |
Questionnaire 6, 12, 18 and 24Â months | x | x | x |
Sickness absence | x | x | x |
Data collection by smartphone | x | x | x |
Physical examination at 24Â months | Â | x | x |