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The Association Between Hay Fever and Stroke in a Cohort of Middle Aged and Elderly Adults

From the Department of Family Medicine at the Medical University of South Carolina, Charleston

Correspondence: Corresponding author: Eric M. Matheson, MD, Department of Family Medicine, Medical University of South Carolina, PO Box 250192, 295 Calhoun Street, Charleston, SC 29425 (E-mail: matheson{at}musc.edu)

Background: Asthma has been linked to stroke, but it is unknown if hay fever is related to stroke. This study was designed to investigate if there is an association between a reported history of hay fever and stroke during a 4.4-year study period.

Methods: Analysis was performed of the Atherosclerosis Risk in Communities study, a cohort of middle aged and elderly adults. We examined the association of a reported history of hay fever to the development of stroke.

Results: There were 9272 participants meeting our criteria, of which 125 had strokes. Of those with a history of hay fever, 2.2% had a stroke. Of those without a history of hay fever, 1.25% had a stroke. Participants with a history of hay fever had an unadjusted hazard ratio of 1.72 (95% CI, 1.08–2.27) for stroke versus participants without hay fever. Risk of stroke remained significant (hazard ratio, 1.87 [95% CI, 1.17–2.99]) after controlling for age, sex, race, smoking status, body mass index, diabetes, hypertension, alcohol use, and hyperlipidemia.

Conclusion: A history of hay fever seems to be a risk factor for stroke, and this association may be an area for future research and intervention.

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