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Relationship between asian dust and ischemic stroke: a time-stratified case-crossover study.
Masahiro Kamouchi1, Kayo Ueda, Tetsuro Ago
1Department of Medicine and Clinical Science, Graduate School of Medical Sciences, Kyushu University, Maidashi 3-1-1, Higashi-ku, Fukuoka 812-8582, Japan. kamouchi@intmed2.med.kyushu-u.ac.jp
Stroke
|September 13, 2012
Summary
Asian dust (AD) exposure is not linked to overall ischemic stroke incidence. However, AD specifically increases the risk of atherothrombotic brain infarction, a subtype of stroke.
Area of Science:
- Environmental Health
- Neurology
- Epidemiology
Background:
- Particulate matter is a known risk factor for cardiovascular diseases.
- The link between Asian dust (AD) and cardiovascular events, particularly ischemic stroke, remains unclear.
- AD originates from mineral soil in China and Mongolia deserts.
Purpose of the Study:
- To investigate the association between Asian dust exposure and the incidence of ischemic stroke.
- To determine if specific subtypes of ischemic stroke are affected by AD.
Main Methods:
- A time-stratified case-crossover study design was employed.
- Data from 7429 ischemic stroke patients admitted to seven stroke centers in Fukuoka, Japan (June 1999-March 2010) were analyzed.
- Conditional logistic regression analysis was used to assess the association between AD and stroke incidence, adjusting for meteorological variables and other air pollutants.
Main Results:
- Asian dust (AD) was not significantly associated with the overall incidence of ischemic stroke.
- A significant association was found between AD exposure and the incidence of atherothrombotic brain infarction, a specific stroke subtype.
- No association was observed between AD and other ischemic stroke subtypes.
Conclusions:
- Asian dust (AD) does not appear to elevate the overall risk of ischemic stroke.
- AD exposure is specifically linked to an increased risk of atherothrombotic brain infarction.
- Further research may be needed to understand the mechanisms underlying this specific association.
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