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Shiftwork and Diurnal Salivary Cortisol Patterns Among Police Officers
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Jun 2016
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Source: J Occup Environ Med. 58(6):542-549.
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Details:
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Alternative Title:J Occup Environ Med
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Description:Objective
To investigate associations between shiftwork and diurnal salivary cortisol among 319 police officers (77.7% men)
Methods
Information on shiftwork was obtained from the City of Buffalo, NY electronic payroll records. Saliva was collected using Salivettes at seven time points and analyzed for free cortisol concentrations (nmol/L) using a chemiluminescence immunoassay. Mean slopes and areas under the curve were compared across shift schedule using analysis of variance (ANOVA)/analysis of covariance (ANCOVA).
Results
Officers working primarily on the night shift had a significantly shallower slope. Mean slope (nmol/L/minutes) of the cortisol curve varied significantly across shifts (day: −0.00332 ± 0.00017, afternoon: −0.00313 ± 0.00018, night: −0.00257 ± 0.0002); adjusted P = 0.023.
Conclusions
Our results suggest that night shiftwork is a work-place factor that may alter the response of the hypothalamic–pituitary–adrenal (HPA) axis to the circadian cues responsible for the pattern of the diurnal cortisol curve.
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Pubmed ID:27129020
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Pubmed Central ID:PMC4909046
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Volume:58
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Issue:6
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