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Occupational Medicine Advance Access published online on May 22, 2006
Occupational Medicine, doi:10.1093/occmed/kql024
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© The Author 2006. Published by Oxford University Press on behalf of the Society of Occupational Medicine. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Article

Vibration exposure and myocardial infarction incidence: the VHEEP case-control study

Bodil Björ 1 *, Lage Burström 2, Tohr Nilsson 3, and Christina Reuterwall 4

1 Occupational Medicine, Umeå University, Umeå, SE-901 85, Sweden
2 Department of Work and Physical Environment, National Institute for Working Life, PO Box 7654, Umeå, SE-907 13, Sweden
3 Occupational Medicine, Department of Public Health and Clinical Medicine, Umeå University, Umeå, S-907 13, Sweden
4 R&D department, Jämtland County Council, PO Box 602, Frösön, S-832 44, Sweden

* To whom correspondence should be addressed.
Bodil Björ, E-mail: Bodil.bjor{at}envmed.umu.se


  Abstract

Objectives The main objectives of this study were to assess the risk of contracting first episode of myocardial infarction (MI) subsequent to vibration exposure and to assess a possible exposure-response relationship.

Methods The Västernorrland heart epidemiology programme (VHEEP, a part of the Stockholm heart epidemiology programme study) was the source of the data. VHEEP is a population-based case-control study of risk factors for acute MI. Exposure information was collected by questionnaire and vibration exposure was assessed in 218 cases and 257 controls. Relative risks were estimated using odds ratios (ORs) from binary logistic regression.

Results The results show that the OR of acute MI when exposed to vibration was 1.6 (95% CI: 1.1-2.4). It was not possible, however, to determine whether an exposure-response relationship was present.

Conclusions Working entailing vibrating machines is associated with an increased risk for acute MI.

Keywords: Case-control; myocardial infarction; occupational; risk factor; vibration.
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