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- W2991527222 abstract "Background: Although epidemiological studies have shown positive associations between ultrafine particles (UFP) and daily mortality, evidence on different particle metrics and size fractions is lacking.Objectives:We explored the associations of daily mortality with short-term exposure to size-fractionated particles measured in number, length, and surface area concentrations in Augsburg, Germany.Methods:We collected daily data on total natural mortality, size-fractionated particle number concentration (PNC), length concentration (PLC), and surface area concentration (PSC) (10-1000 nm) during November 2004 to December 2009. We further collected daily PM2.5, PM10, NO2, and O3. We estimated associations between particles and mortality using Poisson generalized additive models with over-dispersion, while accounting for ambient temperature, long-term and seasonal trend, day of the week, influenza epidemics, and population dynamics due to summer vacation and holiday.Results:We found positive and delayed (lag 6) associations between particles 10-500 nm and daily mortality in all three metrics. For example, an interquartile range increase in PNC10-30, PNC30-50, PNC50-100, and PNC100-500 was associated with 2.53% (95% CI: 0.04, 5.09%), 1.91% (95% CI: -0.14, 4.01%), 1.88% (95% CI: -0.17, 3.97%), and 1.86% (95% CI: -0.19, 3.96%) increase in total natural mortality. The corresponding estimates for UFP (10-100 nm) and PNC10-500 were 2.16% (95% CI: 0.02, 4.00) and 2.26% (0.06, 4.50), respectively. Using PLC or PSC metrics yielded weaker and nonsignificant estimates. No associations with natural mortality were found for particles 500-1000 nm. Associations between size-fractionated PNC, PLC, and PSC remained similar after adjustment for mass concentrations of PM and gaseous pollutants.Conclusions:Size-fractionated PNC within 10-500 nm were associated with natural mortality in Augsburg, whereas no associations were observed for particles within 500-1000 nm (mainly secondary aerosol)." @default.
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- W2991527222 date "2018-09-24" @default.
- W2991527222 modified "2023-09-25" @default.
- W2991527222 title "Size-Fractionated Particle Number, Length, and Surface Area Concentrations and Daily Mortality in Augsburg, Germany, 2004-2009" @default.
- W2991527222 doi "https://doi.org/10.1289/isesisee.2018.p02.1331" @default.
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