The role of particulate size and chemistry in the association between summertime ambient air pollution and hospitalization for cardiorespiratory diseases.

摘要: In order to address the role that ambient air pollution mix, comprised of gaseous pollutants and various physical chemical measures particulate matter, plays in exacerbating cardiorespiratory disease, daily fine coarse mass, aerosol chemistry (sulfates acidity), (ozone, nitrogen dioxide, sulfur carbon monoxide) were collected Toronto, Ontario, Canada, summers 1992, 1993, 1994. These time series then compared with concurrent data on number admissions hospitals for either cardiac diseases (ischemic heart failure, dysthymias) or respiratory (tracheobronchitis, chronic obstructive long asthma, pneumonia). After adjusting admission long-term temporal trends, seasonal variations, effects short-term epidemics, day week effects, temperature dew point temperature, positive associations observed all both diseases. Ozone was least sensitive adjustment measures. However, association between health outcomes monoxide, sulfate levels acidity could be explained by exposure pollutants. Increases ozone, dioxide equivalent their interquartile ranges corresponded an 11% 13% increase hospitalizations diseases, respectively. The inclusion any one multiple regression models did not these percentages. Particle mass identified as independent risk factor exacerbation this study beyond attributable climate pollution. We recommend matter assessed conjunction temporally covarying