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Associations between air pollution, climate factors and outpatient visits for eczema in West China Hospital, Chengdu, south‐western China: a time series analysis
Author(s) -
Li A.,
Fan L.,
Xie L.,
Ren Y.,
Li L.
Publication year - 2018
Publication title -
journal of the european academy of dermatology and venereology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.655
H-Index - 107
eISSN - 1468-3083
pISSN - 0926-9959
DOI - 10.1111/jdv.14730
Subject(s) - medicine , air pollution , environmental health , relative humidity , outpatient visits , china , air pollutants , pollutant , outpatient clinic , incidence (geometry) , population , demography , meteorology , geography , health care , chemistry , physics , organic chemistry , archaeology , sociology , economic growth , optics , economics
Background Eczema is one of the most common inflammatory dermatoses that can be provoked as a result of external and internal factors. With dense population and rapid economic development of China, air pollution is still a serious problem and the prevalence of eczema has been elevating. Objective To determine the association and lagged effects between environmental factors and the outpatient visits for eczema. Methods Data of daily outpatient visits for eczema at the clinics of dermatology in West China Hospital within the last 5 years were collected. Data of environmental factors of Chengdu during the same period, including temperature, relative humidity, barometric pressure, wind speed and air pollutants concentrations like sulphur dioxide (SO 2 ), nitrogen dioxide (NO 2 ) and particular matter (PM 10 ), were gathered. The distributed lag nonlinear model was used to statistically examine the relationship between eczema and environmental factors and their lagged effects. Results Correlation analysis showed that eczema outpatient visits were positively correlated with the air pollutants and were negatively correlated with relative humidity. The barometric pressure and wind speed influenced the outpatient visits in association with air pollutants. Conclusion This study provides evidence that environmental factors like relative humidity and multiple air pollutants influence the incidence and prevalence of eczema and have lagged effects.