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Circadian Adaptation of Melatonin and Cortisol in Police Officers Working Rotating Shifts
Changes in Melatonin and Cortisol Rhythms in Police Officers Working Rotating Shifts
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Abstract
After a series of night shifts, 30% of police officers adapted to a night-oriented schedule based on .
- Before shifts, 60%-89% of officers were adapted to a day schedule based on aMT6 rhythms.
- 71%-78% of officers were adapted to a day schedule based on rhythms before shifts.
- Officers who adapted to night shifts experienced significantly larger phase-delay shifts in aMT6s (-7.3 ± 0.9 h) and cortisol (-6.3 ± 0.8 h) compared to non-adapted officers.
- A large proportion of police officers remained in a state of circadian misalignment after working night shifts.
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Key numbers
30%
Adaptation Rate for
Percentage of officers whose rhythms adapted to night shifts.
24%
Adaptation Rate for
Percentage of officers whose rhythms adapted to night shifts.
6.4 h vs. 5.8 h
Cumulative Sleep Difference
Average cumulative sleep per day for adapted vs. non-adapted officers during night shifts.