Association Of Meteorological Factors With Daily Outpatient Visits For Eczema In Lanzhou Area

BackgroundInfluenced by the industrialization,the prevalence of eczema has been increasing,but the pathogenesis of eczema is complex and not clear,particular the effect of environmental factors on patients with eczema remain largely unexplored.This study was launched to assess the impact and risk of weather factors on the number of visits to provide a scientific basis for prevention and control disease by the characteristics of time series and dynamic changes of meteorological factors and eczema daily outpatient visits in Lanzhou.Research Objects and MethodsThe datas of patients with eczema were collected from January 1,2013 to December 31,2016 in department of dermatology at two large-scale tertiary hospital in Lanzhou,and the meteorological data of the same period were collected from Gansu Meteorological Bureau.On the basis of controlling the long-term trend and the day-of-the-week effect,the distributed lag nonlinear model was adopted to analysis of meteorological factors effect of eczema outpatient visits and lag effect in stratification of gender and age,after fitting by quasi-Poisson connection and considering of the characteristics of temperature,humidity,and season.Results1.The number of visits to eczema is related to meteorological factors.2.The effect of daily average temperature on outpatient visits for eczema showed double negative effects,that is the risk of eczema patient visits was increased to high temperature and low temperature.And the daily average relative humidity was negatively correlated with the outpatient visits for eczema.The lower the humidity,the higher the risk of eczema.On the contrary,the higher humidity,the lower risk of eczema in the region.3.The impact of meteorological factors on eczema day visits in Lanzhou region is immediate and lagging.Comparing the effects of different temperature and eczema day visits,it was found that the temperature decreased by 1°C/h in both low and high temperatures.The risk of patient visits on eczema increased by approximately 35% and 29%,respectively,with an increase of 1°C,lag2days/lag0 days,among which the ?18year group,the female group,and the ?65year group were more exposed than others.Sensitive(larger RR value).For relative humidity,the main performance is that low humidity can increase the risk of eczema visits,that is,at low humidity,lag 14 days,the relative humidity of every 1% of the population reduced the risk of eczema patient visits will increase by 49%,of which 19-The 64-year-old group and the ?65-year-old group were significantly more than other groups.On the contrary,high humidity had no obvious dangerous in the region.4.The cumulative effect of daily average temperature on outpatient visits for eczema was strongest in winter,followed by autumn,summer and spring;At the same time,the cumulative effect of daily average relative humidity on outpatient visits for eczema in different seasons was mainly in autumn and winter,then it was followed by summer,spring was relatively weakest.ConclusionsThis study mainly focused on the effect of meteorological factors(daily average temperature and daily average relative humidity)on the outpatient visits for eczema in Lanzhou area.There was double effects on temperature: the lag of low temperature and the instant of high temperature;the relative humidity and eczema daily number of visits was significantly negatively correlated with high humidity.As for different seasons,different daily average temperature and relative humidity have different impacts on the number of visits for eczema day,particular in autumn and winter.