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Shift Work and Unhealthy Dietary Patterns: Evidence From the Shahedieh Cohort Study
Akram Heydarizadeh1, Sayyed Saeed Khayyatzade2, Reyhane Sefidkar3
1Department of Occupational Health, School of Public Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.
Safety and Health at Work
|July 1, 2026
Summary
Shift workers in Iran consume more processed foods and soft drinks than non-shift workers. This indicates a less healthy dietary pattern, necessitating targeted nutritional interventions for this population.
Area of Science:
- Nutrition Science
- Occupational Health
- Public Health
Background:
- Limited evidence exists on shift workers' dietary patterns in Middle Eastern populations.
- This study focuses on comparing dietary habits of male shift workers with non-shift workers in Iran.
Purpose of the Study:
- To investigate and compare the dietary patterns of male shift workers and non-shift workers in Iran.
- To identify specific food categories and nutritional intake differences between these groups.
Main Methods:
- Cross-sectional analysis of baseline data from the Shahedieh cohort study (2015-2017).
- Dietary intake assessed via a validated food frequency questionnaire.
- Shift work status, demographics, socioeconomic factors, and lifestyle data collected through interviews.
Main Results:
- Shift workers (16.8%) consumed significantly more high-fat dairy, snacks, soft drinks, and total processed foods.
- Differences in pizza consumption and meal frequency were noted.
- Driver shift workers showed strong associations with soft drink and processed food intake; age modified some associations.
Conclusions:
- Shift workers in Iran exhibit a less healthy dietary profile compared to non-shift workers.
- Findings underscore the need for targeted nutritional interventions and policies for shift workers.
- Promoting healthy eating behaviors among shift workers is crucial.
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