title: [Effect of ambient air PM10 concentration on the hospital outpatient visit of respiratory diseases in Shenzhen City].
abstract: OBJECTIVE
  To explore quantitatively the impact of the ambient air PM10 concentration (inhalable particulate matter) on the hospital outpatients for respiratory diseases.
  
  
  METHODS
  Daily hospital visits data in 2008 was collected from a hospital in Shenzhen, meteorological data and air pollution data were collected from Shenzhen Meteorological Bureau and Shenzhen Environmental Protection Bureau, respectively. There was a time serial analysis using semi-parameter generalized additive model extend Poisson regression, after controlled with long-term tend, the-day-of-week, meteorological factors and other air pollutants. Excess relative risks (ER) of daily hospital visits associated with increased PM10 level were estimated.
  
  
  RESULTS
  Ambient air PM10 concentration were no association with the increase of outpatients for respiratory in the same day. The lagged effect of 5 days with an ER of 1.113% (95% CI 0.613% - 1.616%) was observed. Except (PM10 + CO) model, the ER value increased when SO2, NO2, CO concentrations were introduced.
  
  
  CONCLUSIONS
  The ambient air PM10 concentration could positively associated with the increase of daily hospital visits for respiratory diseases in Shenzhen.
authors.affiliation: Shenzhen Center for Disease Control and Prevention, Shenzhen 518055, China.
authors.forename: Zhaoqiong
authors.initials: Z
authors.lastname: Peng
authors.forename: Shuyuan
authors.initials: S
authors.lastname: Yu
authors.forename: Zhen
authors.initials: Z
authors.lastname: Zhang
authors.forename: Guohong
authors.initials: G
authors.lastname: Liu
authors.forename: Long
authors.initials: L
authors.lastname: He
authors.forename: Xiangqing
authors.initials: X
authors.lastname: Liao
authors.forename: Ling
authors.initials: L
authors.lastname: Zhang
authors.forename: Hui
authors.initials: H
authors.lastname: Wu
authors.forename: Yongsheng
authors.initials: Y
authors.lastname: Wu
mesh_terms: D000397:Air Pollution / Q000009:adverse effects* / Q000706:statistics & numerical data; D000553:Ambulatory Care / Q000706:statistics & numerical data*; D001991:Bronchitis / Q000453:epidemiology / Q000209:etiology; D002248:Carbon Monoxide / Q000032:analysis; D002681:China / Q000453:epidemiology; D004781:Environmental Exposure / Q000009:adverse effects* / Q000032:analysis; D006801:Humans; D009585:Nitrogen Dioxide / Q000032:analysis; D052638:Particulate Matter / Q000009:adverse effects* / Q000032:analysis; D011014:Pneumonia / Q000453:epidemiology / Q000209:etiology; D013458:Sulfur Dioxide / Q000032:analysis
chemical_list: D052638:Particulate Matter; D013458:Sulfur Dioxide; D002248:Carbon Monoxide; D009585:Nitrogen Dioxide