Ambient particulate matter and biomass burning: an ecological time series study of respiratory and cardiovascular hospital visits in northern Thailand.

摘要: Exposure to particulate matter (PM) emitted from biomass burning is an increasing concern, particularly in Southeast Asia. It not yet clear how the source of PM influences risk adverse health outcome. The objective this study was quantify and compare risks non-biomass sources northern Thailand. We collected ambient air pollutant data (PM with a diameter < 10 μm [PM10], PM2.5, Carbon Monoxide [CO], Ozone [O3], Nitrogen Dioxide [NO2]) ground-based monitors daily outpatient hospital visits Thailand during 2014–2017. Outpatient included chronic lower respiratory disease (CLRD), ischaemic heart (IHD), cerebrovascular (CBVD). performed ecological time series analysis evaluate association between pollutants visits. used 90th 95th percentiles PM10 concentrations determine days exposure predominantly burning. There significant intra annual variation levels, highest occurring March, coinciding peak Incidence Rate Ratios (IRRs) were elevated most on same day as for CLRD = 1.020 (95% CI: 1.012 1.028) CBVD = 1.020 1.004 1.035), no IHD = 0.994 0.974 1.014). Adjusting CO tended increase effect estimates. did find evidence response relationship levels found same-day exposures be associated certain cardiovascular advise implementing measures reduce population wherever possible, improve understanding effects specific types areas where such large-scale activities occur.