Associations between shift work arrangements, sleep characteristics, urinary cortisol and melatonin levels among nurses in Hong Kong

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Observational analysis examined cortisol and melatonin variations in nurses with different shift patterns, suggesting sleep impacts hormone levels.

Shift nurses following a PAN pattern experienced less sleep than non-PAN nurses, impacting cortisol and melatonin.
Cortisol levels were significantly reduced in non-PAN nurses compared to daytime workers, highlighting the hormonal impact of shifts.
Enhancing sleep duration reduced cortisol by 10.3% per hour, indicating the importance of sleep for hormonal balance.
Findings point to the need for optimized shift arrangements to improve hormonal health in shift workers.

Li et al. (2025) studied this question.

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Observational analysis examined cortisol and melatonin variations in nurses with different shift patterns, suggesting sleep impacts hormone levels.