Safety and Health at Work

Occupational Safety and Health Research Institute, Korea Occupational Safety and Health Agency (산업안전보건연구원)
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Occupational Lifting Tasks and Retinal Detachment in Non-Myopics and Myopics: Extended Analysis of a Case-Control Study

  • Mattioli, Stefano (Section of Occupational Medicine, Department of Internal Medicine, Geriatrics and Nephrology, University of Bologna) ;
  • Curti, Stefania (Section of Occupational Medicine, Department of Internal Medicine, Geriatrics and Nephrology, University of Bologna) ;
  • De Fazio, Rocco (Ophthalmology Unit, Maggiore Pizzardi CA Hospital) ;
  • Mt Cooke, Robin (Section of Occupational Medicine, Department of Internal Medicine, Geriatrics and Nephrology, University of Bologna) ;
  • Zanardi, Francesca (Section of Occupational Medicine, Department of Internal Medicine, Geriatrics and Nephrology, University of Bologna) ;
  • Bonfiglioli, Roberta (Section of Occupational Medicine, Department of Internal Medicine, Geriatrics and Nephrology, University of Bologna) ;
  • Farioli, Andrea (Section of Occupational Medicine, Department of Internal Medicine, Geriatrics and Nephrology, University of Bologna) ;
  • Violante, Francesco S. (Section of Occupational Medicine, Department of Internal Medicine, Geriatrics and Nephrology, University of Bologna)
  • Received : 2011.09.02
  • Accepted : 2012.01.02
  • Published : 2012.03.30
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Abstract

Objectives: Lifting heavy weights involves the Valsalva manoeuvre, which leads to intraocular pressure spikes. We used data from a case-control study to further investigate the hypothesis that occupational lifting is a risk factor for retinal detachment. Methods: The study population included 48 cases (patients operated for retinal detachment) and 84 controls (outpatients attending an eye clinic). The odds ratios (OR) of idiopathic retinal detachment were estimated with a logistic regression model (adjusted for age, sex and body mass index). Three indexes were used to examine exposure to lifting; 1) maximum load lifted, 2) average weekly lifting, 3) lifelong cumulative lifting. Results: For all indexes, the most exposed subjects showed an increased risk of retinal detachment compared with the unexposed (index 1: OR 3.57, 95% confidence interval [CI] 1.21-10.48; index 2: OR 3.24, 95% CI 1.32-7.97; index 3: OR 2.23, 95% CI 1.27-8.74) and dose-response relationships were apparent. Conclusion: These results reinforce the hypothesis that heavy occupational lifting may be a relevant risk factor for retinal detachment.

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