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Rotating shift work time is directly associated with excess body adiposity.

Felipe Reis Stavaux Baudson1, Luiz Antônio Alves de Menezes-Júnior2, Sílvia Nascimento de Freita3

  • 1Post-graduate Program in Health and Nutrition, Nutrition School, Federal University of Ouro Preto, Ouro Preto, Minas Gerais, Brazil.

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Longer durations of rotating shift work significantly increase the odds of overweight and altered body adiposity indicators. This highlights the occupational health risks associated with prolonged shift schedules, especially for those with comorbidities.

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Area of Science:

  • Occupational Health
  • Anthropometry
  • Epidemiology

Background:

  • Rotating shift work is common in industries like iron ore extraction.
  • Shift work is associated with various health issues, including metabolic disturbances.
  • Understanding the impact of work duration on body adiposity is crucial for worker well-being.

Purpose of the Study:

  • To investigate the association between the length of service in rotating shifts and body adiposity.
  • To identify anthropometric indicators affected by prolonged shift work.
  • To explore the influence of comorbidities on shift work-related adiposity.

Main Methods:

  • Cross-sectional study (2012, 2015, 2018) of rotating shift workers in Brazil.
  • Collected sociodemographic, behavioral, and anthropometric data.
  • Used multivariate logistic regression to analyze associations between adiposity indicators and shift work duration.

Main Results:

  • Increased years of shift work correlated with higher odds of being overweight (BMI > 25.0 kg/m²).
  • Significant associations found between shift duration and altered neck circumference, waist circumference (WC), and waist-to-height ratio (WHtR).
  • Odds ratios for overweight ranged from 1.41 to 1.96 for 5-15+ years of shift work.

Conclusions:

  • Prolonged exposure to rotating shift work significantly impacts anthropometric indicators of body adiposity.
  • The effect is more pronounced in workers with pre-existing comorbidities like dyslipidemia or hypertension.
  • Frequent night work exposure exacerbates the negative effects of shift duration on body composition.