log2 (number of hours) 5.0 0.7 1.0–6.6
Working non-conventional hours (times/month) 12.6 10.0 0.0–52
Work schedule changes
Work schedule changes on the day itself 12.0%
Work schedule changes one day in advance 28.4%
Work schedule changes week/month in advance 16.3%
(No changes = ref) 43.4%