Various meteorological conditions exhibit both immediate and delayed influences on the risk of stroke events: The HEWS-stroke study

We hypothesized that meteorological conditions on the onset day and conditions on the former days may play important roles in the modulation of physical conditions. Associations of meteorological factors and their changes in former days with stroke onset are of interest. We conducted a multicenter r...

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Bibliographic Details
Published in:PloS one 2017-06, Vol.12 (6), p.e0178223-e0178223
Main Authors: Mukai, Tomoya, Hosomi, Naohisa, Tsunematsu, Miwako, Sueda, Yoshimasa, Shimoe, Yutaka, Ohshita, Tomohiko, Torii, Tsuyoshi, Aoki, Shiro, Nezu, Tomohisa, Maruyama, Hirofumi, Kakehashi, Masayuki, Matsumoto, Masayasu
Format: Article
Language:English
Subjects:
Aged
Aged, 80 and over
Analysis
Atmospheric models
Atmospheric Pressure
Cerebral Hemorrhage - epidemiology
Cholesterol
Classification
Confidence intervals
Diabetes
Earth Sciences
Emergency medical care
Epidemiology
Female
Females
Health informatics
Health sciences
Hemorrhage
Hospitals
Humans
Hydrologic models
Hydrology
Hypertension
Ischemia
Japan - epidemiology
Male
Medicine and Health Sciences
Meteorological Concepts
Meteorological conditions
Middle Aged
Neurology
Neurosciences
NMR
Nuclear magnetic resonance
Observatories
Oscillating frequencies
People and Places
Physical Sciences
Regression
Regression analysis
Regression models
Risk Factors
Stroke
Stroke - epidemiology
Temperature
Temperature effects
University graduates
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Summary:We hypothesized that meteorological conditions on the onset day and conditions on the former days may play important roles in the modulation of physical conditions. Associations of meteorological factors and their changes in former days with stroke onset are of interest. We conducted a multicenter retrospective study to evaluate the frequency of stroke events and their interaction with meteorological conditions and their daily changes. Acute stroke patients (n = 3935, 73.5±12.4 years, 1610 females) who were admitted to 7 stroke hospitals in three restricted areas were enrolled in this study. Poisson regression models involving time-lag variables was used to compare daily rates of stroke events with mean thermo-hydrological index (THI), atmospheric pressure, and their daily changes. We divided onset days into quintiles based on the THI, atmospheric pressure, and their daily changes for the last 7 days. The frequencies of ischemic stroke significantly increased when THI varied either cooler or warmer from a previous day (extremely cooler, risk ratio (RR) 1.19, 95% confidence interval (CI) 1.05 to 1.34; extremely warmer, RR 1.16, 95% CI 1.03 to 1.31; r2 = 0.001 for the best regression, p = 0.001). Intracerebral hemorrhage frequencies significantly decreased on high-THI days (extremely high, RR 0.72, 95% CI 0.54 to 0.95; r2 = 0.013 for the best regression, p
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0178223