Modeling Causal Factors of Occupational Accidents in Chemical Industries: A 10-Year Field Study in Iran

Document Type: Research Article

Authors

1 Occupational Hygiene Engineering Department, Center of Environmental Pollutants, Health Faculty, Qom University of Medical Science, Qom, Iran.

2 Occupational Hygiene Engineering Department, School of Public Health, Shiraz University of Medical Science, Shiraz, Iran.

3 Occupational Hygiene Engineering Department, School of Public Health, Shahid-Beheshti University of Medical Science, Tehran, Iran.

4 Department of Epidemiology, Center of Environmental Pollutants, Health Faculty, Qom University of Medical Science, Qom, Iran.

Abstract

Introduction: Analyzing and modeling causal factors of occupational accidents play an important role in planning prevention programs. The aim of the study was to explore the causal factors of occupational accidents in chemical industries in Iran.
Method: The reports of 1322 accidents from 2007 to 2016 were gathered from 22 chemical industries. First, accident frequency rate (AFR) was calculated and all the effective factors were reviewed and labeled as “dependent” and “independent” factors. Second, feature selection was conducted to find the important causal factors. Then, multiple linear regression analysis was employed to model the most frequent causal factors in accidents occurrence.
Results: The average accident frequency rate (AFR) was 87.75±74.82. A total of 30 independent casual factors were identified to be eligible for further analysis. Results of multiple linear regression analysis showed that 21 out of 30 important casual factors had the most important role in occupational accidents which are categorized into personal factors, organizational factors, HSE training, risk management, unsafe acts and conditions as well as the type of accident occurrence.
Conclusion: This study revealed that any preventive program should consider the importance of each casual factor in occurring occupational accidents. The higher level of importance needs the higher level of attention.

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