Association between Air Pollution and Daily Outpatient Visits of Respiratory System in Children Hospital of Zhengzhou

Objectives To study the correlation of air poilution and daily outpatient visits of respiratory system disease.

Methods The following data were collected from the outpatient visits of respiratory system disease in Children Hospital of Zhengzhou from 2013 to 2014, the air monitoring data from Environmental Monitoring sites in Zhengzhou, and the meteorological data from Zhengzhou. The time-series analysis was adopted to analyze the generalized linear model in order to study the association between air pollution and children outpatient visits.

Results The hospital outpatient visits of respiratory system was significantly positively correlated with PM₁₀, PM_2.5, NO₂, and SO₂ according to the Spearman correlation analysis (P < 0.01); an increase of 10 μg/m³ in concentrations of PM₁₀ could increase the hospital outpatient visits of respiratory system disease by 0.72%; an increase of 10 μg/m³ in concentrations of PM_2.5 could increase the hospital outpatient visits of respiratory system disease by 0.90%;an increase of 10 μg/m³ in concentrations of NO₂ could increase the hospital outpatient visits of respiratory system disease by 7.73%, the strongest ER effect is 9.88% with (0~5) d accumulated delay; an increase of 10 μg/m³ in concentrations of SO₂ could increase the hospital outpatient visits for respiratory system by 2.92%, the strongest excess risk(ER) effect is 3.22% with (0~3) d accumulated delay.

Conclusions The concentration of air pollutants could increase daily outpatient visits of respiratory system in children hospital of Zhengzhou City.