Choice of a Denominator for Occupational Injury Rates A Study of the Development of a Swedish Iron-Ore Mine |
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| Authors: | Vera L G Blank Lucie Laflamme Finn Diderichsen and Ragnar Andersson |
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| Institution: | 1. University of Michigan, Ann Arbor, Michigan;2. Munson Medical Center, Traverse City, Michigan;3. Henry Ford Hospital, Detroit, Michigan;4. Beaumont Health System, Royal Oak, Michigan;6. McLaren Northern Michigan, Petoskey, Michigan;1. Department of Midwifery, Tuyserkan Branch, Islamic Azad University, Tuyserkan, Iran;2. Non-Communicable Diseases Research Center, Endocrinology and Metabolism Population Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran;3. Sina Trauma and Surgery Research Center, Tehran University of Medical Sciences, Tehran, Iran;4. Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran;5. Department of Surgery, Kaiser Permanente Fontana Medical Center, Fontana, CA, USA;6. Deputy for Public Health, Ministry of Health and Medical Education, Tehran, Iran;7. Preventive Medicine and Public Health Research Center, Iran University of Medical Sciences, Tehran, Iran;8. Institute for Health Metrics and Evaluation, University of Washington, Washington, USA;9. Department of Epidemiology and Preventive Medicine, School of Public Health and Preventive Medicine, Monash University, Melbourne, Australia;10. Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran;11. Center for Health Related Social and Behavioral Sciences Research, Shahroud University of Medical Sciences, Shahroud, Iran;1. School of Civil and Environmental Engineering, University of Science and Technology Beijing, No. 30 Xueyuan Road, Haidian District, Beijing 100083, PR China;2. Ministry of Education, Key Laboratory of High Efficiency Mining and Safety for Metal Mines, University of Science and Technology Beijing, No. 30 Xueyuan Road, Haidian District, Beijing 100083, PR China;3. Norman B. Keevil Institute of Mining Engineering, University of British Columbia, 517-6350 Stores Road, Vancouver, B.C. V6T 1Z4, Canada;4. China Association of Work Safety, No. 21 North Hepingli Road, Dongcheng District, Beijing 100713, PR China;1. School of life Sciences, Key Laboratory of Ecological Engineering and Biotechnology of Anhui Province, Anhui University, 230601,Anhui, PR China;2. College of Chemistry and Chemical Engineering, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, 230601,Anhui, PR China |
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| Abstract: | This study is concerned with the longitudinal representation of injury risk obtained using alternative injury-rate denominators—hours worked and production volume. It investigates injury risks at the underground extraction phase in a Swedish iron-ore mine. Six stages of mining development are defined, and three risk measures are employed: average injury rates (AIRs) by stage, injury rate ratios (IRRs) by stage, and annual injury rates (AnIRs). The two denominators give a quite different representation of injury risk at the early stages of the development of the mine, but tend increasingly to provide a similar picture (similar ratios) at later stages. It is concluded that automated production processes, as opposed to mechanized ones, tend to make hours worked and production volume interchangeable denominators. Choice of appropriate denominator may depend upon whether the individual or the production process is in focus. |
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| Keywords: | Occupational injury rates Swedish iron-ore mine hours worked production volume |
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