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Occupational noise exposure and the risk of stroke
Zara A Stokholm1, Jens Peter Bonde, Kent L Christensen
1From the Department of Occupational Medicine, Danish Ramazzini Centre, Aarhus University Hospital, Denmark (Z.A.S., H.A.K.); Department of Occupational and Environmental Medicine, Bispebjerg Hospital, Denmark (J.P.B.); Department of Internal Medicine and Cardiology A, Aarhus University Hospital, Denmark (K.L.C.); and Department of Public Health, University of Copenhagen, Denmark (Å.M.H.).
Background And Purpose:
Traffic noise <60 dB(A) has been associated with an increased risk of stroke. We investigated this relationship for 80 to 86 dB(A) occupational noise.
Methods:
We followed 116,568 industrial and 47,679 financial workers by linkage to Danish registries 2001 through 2007. Full-shift noise levels were estimated from subsets of workers at baseline and end of follow-up.
Results:
We identified 981 stroke patients and observed a 27% increased confounder-adjusted risk of stroke for industrial compared with financial workers. However, longer duration or higher noise level within the industrial workers were unrelated to the risk of stroke.
Conclusions:
Our study did not support an association between occupational noise exposure and stroke, and the higher risk among industrial workers may reflect lifestyle differences.
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