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BMC Neurology
Published in: BMC Neurology 1/2016

Open Access 01-12-2016 | Research article

Association between hemorrhagic stroke occurrence and meteorological factors and pollutants

Authors: Myung-Hoon Han, Hyeong-Joong Yi, Yong Ko, Young-Soo Kim, Young-Jun Lee

Published in: BMC Neurology | Issue 1/2016

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Abstract

Background

The purpose of this study is to determine whether intracerebral hemorrhage and subarachnoid hemorrhage have different incidence patterns based on monthly variations in meteorological and air pollution parameters in the Seongdong district of Seoul, South Korea.

Methods

From January 1, 2004 to December 31, 2014, 1,477 consecutive hemorrhagic stroke events (>19 years old) were registered among residents of the Seongdong district, Seoul, South Korea. The authors calculated the relative risk of hemorrhagic stroke and its subtype incidence based on meteorological and air pollution factors. We also estimated relative risk with 95 % confidence intervals using a multivariate Poisson regression model to identify potential independent variables among meteorological factors and pollutants associated with either intracerebral hemorrhage or subarachnoid hemorrhage occurrence.

Results

We observed a negative correlation between intracerebral hemorrhage and mean temperature. In the multivariate Poisson model, particulate matter with an aerodynamic diameter < 10 μm showed positive correlations with intracerebral hemorrhage (relative risk, 1.09; 95 % confidence interval, 1.02 to 1.15; P = 0.012). In contrast, ozone correlated significantly with subarachnoid hemorrhage occurrence (relative risk, 1.32; 95 % confidence interval, 1.10 to 1.58; P = 0.003).

Conclusions

Our findings show the relationship between hemorrhagic stroke and meteorological parameters and pollutants under similar weather and environmental conditions in a small area. Among meteorological and pollutant variables, only higher particulate matter concentrations correlated independently with intracerebral hemorrhage occurrence, while only ozone was independently associated with subarachnoid hemorrhage occurrence. These findings suggest the possibility that there are pathogenic associations between hemorrhagic stroke and meteorological factors and pollutants.
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Metadata
Title
Association between hemorrhagic stroke occurrence and meteorological factors and pollutants
Authors
Myung-Hoon Han
Hyeong-Joong Yi
Yong Ko
Young-Soo Kim
Young-Jun Lee
Publication date
01-12-2016
Publisher
BioMed Central
Published in
BMC Neurology / Issue 1/2016
Electronic ISSN: 1471-2377
DOI
https://doi.org/10.1186/s12883-016-0579-2

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