Table of Contents
International Scholarly Research Notices
Volume 2014, Article ID 597106, 8 pages
http://dx.doi.org/10.1155/2014/597106
Research Article

Meteorological Variables Associated with Stroke

Department of Emergency Medicine, Drexel University College of Medicine, MS 1011, NCB, 245 N. 15th Street, Philadelphia, PA 19102, USA

Received 10 June 2014; Revised 14 November 2014; Accepted 15 November 2014; Published 30 November 2014

Academic Editor: Adriá Arboix Damut

Copyright © 2014 Romy Nocera et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

To elucidate relationships between meteorological variables and incidence of stroke, we studied patients diagnosed with stroke after presenting to the emergency department (May 1, 2010–August 8, 2011). Patient demographics and medical data were reviewed retrospectively with regional meteorological data. Across 467 days, 134 stroke events were recorded on 114 days. On stroke days, maximum temperature (max ) and atmospheric pressure (AP) combined were a significant predictor of stroke (max odds ratio (OR) = 1.014, 95% confidence interval (CI) = 1.003–1.026, and ; AP: OR = 1.033, 95% CI = 0.997–1.071, and ). When the patient could identify the hour of the stroke, average temperature (avg ) was significantly higher than nonstroke hours (18.2°C versus 16.16°C, ). Daily fluctuations in AP and avg also had significant effects on stroke incidence (AP: OR = 0.629, 95% CI = 0.512–0.773, and ; avg OR = 1.1399, 95% CI = 1.218–606, and ). Patient age, stroke history, body mass index, ethnicity, and sex were further contributors to stroke risk. Temperature, atmospheric pressure, and certain physiological conditions likely play roles in weather-related stroke susceptibility. The mechanisms driving these associations are not fully understood.