The relationship between meteorological factors and stroke incidence in Chaohu city

Objective:To investigate the effects of meteorological factors on the incidence of stroke for providing the basis of the stroke prevention.Methods:The data of 11100 cases with stroke from 2008 to 2012 were collected in Chaohu city.The relationships between the onset time of stroke and temperature, air pressure and relative humidity in Chaohu were analyzed using univariate correlation analysis, and the central tendency of disease was analyzed using a round distribution analysis.Results:The incidence of cerebral hemorrhage was negatively correlated with air temperature, positively correlated with air pressure(P<0.01), and not correlated with relative humidity(P>0.05).The cerebral infarction was positively correlated with air temperature(P=0.01), and not correlated with air pressure and relative humidity(P>0.05).The annual incidence of cerebral hemorrhage showed significantly central tendency from 2008 to 2012(P<0.05), and the total incidence also showed a central tendency, the average angle of which was 12.222 8°, equivalent to 13 January.The differences of the average angle of cerebral infarction in 2008, 2010 and 2012, equivalent to 8 July, 11 August, 20 September, were statistically significant(P<0.05), but the difference of five-year total average angle was not statistically significant(P>0.05).Conclusions:The incidence of cerebral hemorrhage in Chaohu city has a clear seasonality, major in December to February of winter and minor in summer.The onset of cerebral infarction trend tends to be higher in summer and autumn, lower in the spring and winter.