Abstract:
Objective To evaluate the health effect of air pollutants on outpatient visits for cardiovascular diseases in Liu'an City.
Methods A Generalized Additive Poisson Regression Model was used to examine the time-series and exposure-response relationship between the daily morbidity of cardiovascular diseases and the concentration of ambient SO2, NO2 and PM10 from Jan 1, 2012 to Dec 31, 2013 in Liu'an city after controlling the effect of long-term trends of variation, such as "the day of a week" and meteorological factors.
Results The number of daily outpatient visit for cardiovascular diseases was 69.7. The results of a single-pollutant generalized additive Poisson regression model showed a protection of SO2 on the number of outpatient visit for cardiovascular diseases with a 3 days delay, the maximum RR for outpatient visits on each 10 μg/m3 increment of SO2 was 0.9987 (CI:0.9975~0.9998). The increment of NO2 and PM10 concentration showed a significant increase of outpatient visit for cardiovascular diseases with a 3 days and 4 days delay, respectively. The maximum RR for daily outpatient visits on each 10 μg/m3 increment of NO2 and PM10 were 1.0022(1.0012~1.0031) and 1.00054(1.0002~1.0008), respectively.
Conclusion The concentration of SO2 was positively associated with daily outpatient visits; and the concentration of NO2 and PM10 was positively associated with daily outpatient visits for respiratory and cardiovascular diseases in Liu'an city.
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