The circadian rhythm results in an elevated cardiovascular threat for shift staff

April 25, 2021

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The Circadian Rhythm Results In An Elevated Cardiovascular Threat For Shift Staff

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Gamboa Madeira S, et al. Moderated Abstracts – Population Science and Public Health. Presented at: European Society of Cardiology Preventive Cardiology 2021; 15.-17. April 2021 (virtual meeting).

Disclosure:
Gamboa Madeira does not report any relevant financial disclosures.

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In individual shift workers, circadian misalignment was linked to increased cardiovascular risk, according to results presented at the European Society of Cardiology’s Conference on Preventive Cardiology.

“We all have an internal biological clock, from morning types (larks), who feel awake and productive in the early morning and feel sleepy in the evening, to late types (owls), for whom the opposite is true – most of them the Population falls in between “, toR.the Gamboa Madeira, MD, This was announced by a doctoral student and doctor from the University of Lisbon in Portugal in a press release. “Circadian misalignment occurs when what your body wants (e.g., falling asleep at 10 p.m.) and your social commitments (e.g., working until midnight) mismatch.”

The Circadian Rhythm Results In An Elevated Cardiovascular Threat For Shift StaffSource: Adobe Stock

The cross-sectional observational study involved 301 workers (mean age 33 years; 56% men) who did manual picking in warehouses in Portugal. The workers always worked early in the morning (6 a.m. to 3 p.m.), late in the evening (3 p.m. to midnight) or at night (9 p.m. to 6 a.m.). Each participant completed a questionnaire on sociodemographic factors, occupational factors, and lifestyle factors. The researchers collected their blood pressure and cholesterol levels.

The Munich Chronotype Questionnaire recorded sleep duration and sleep chronotype and quantified the extent of the circadian misalignment. Participants were divided into groups based on circadian misalignment, with 59.4% in the 2-hour or less group, 33% in the 2-4-hour group, and 8% in the 4-hour group. or more group were.

In the cohort, 20% of participants were rated as high cardiovascular risk and 40% had short sleep periods of 6 hours or less on workdays. Participants with a higher circadian misalignment showed a significant association with an increased likelihood of high risk for CVD with a prevalence of 37.5% in those with 4 hours or more compared to a prevalence of 17.3% in those with 2 hours or less (P for trend = .035).

The likelihood of being in the high CV group increased 31% with every hour of circadian misalignment increase, the researchers found.

Greater circadian misalignment was also associated with increased prevalence of hypertension (P for trend = 0.006) and smoking (P for trend = 0.043), but not hypercholesterolemia, the researchers said.

Gamboa Madeira said the results support increasing evidence that circadian misalignment can help explain the links between shiftwork and health outcomes.

“The results suggest that employees with atypical work schedules may need closer of heart health,” Gamboa Madeira said in the press release. “Longitudinal studies are needed to investigate whether late chronotypes, both psychologically and physiologically, cope better with late / night shifts and earlier chronotypes on early morning schedules.”

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