Figure 1.

Percent difference (95% CI) in hourly cases of myocardial infarction (MI) per interquartile range (IQR) increase in particle metrics in Augsburg, Germany from 2005 to 2015. A time-stratified case-crossover design with a conditional logistic model was used to derive the estimates while adjusting for natural splines of air temperature and relative humidity at lag 1–72 h (each with 4 degrees of freedom). Short-term associations were estimated at single-hour lags (lag0–lag6) and for moving averages (lag1–6, lag7–12, lag13–18, lag19–24, lag25–72, lag1–24, lag1–48, and lag1–72). Corresponding numeric data are provided in Table S1. For PSC, measurements during 1 January 2005–30 April 2012 were used. Note: PLC, particle length concentration; ${\mathrm{PM}}_{2.5}$, particulate matter with an aerodynamic diameter $<2.5\mathrm{\mu }\mathrm{m}$; ${\mathrm{PM}}_{10}$, particulate matter with an aerodynamic diameter $<10\mathrm{\mu }\mathrm{m}$. PNC, particle number concentration; ${\text{PNC}}_{10–30}$, PNC of particles with $10–30\text{\hspace{0.17em} nm}$ mobility diameter; ${\text{PNC}}_{30–100}$, PNC of particles with $30–100\text{\hspace{0.17em} nm}$ mobility diameter; ${\text{PNC}}_{10–100}$, PNC of particles with $10–100\text{\hspace{0.17em} nm}$ mobility diameter; ${\text{PNC}}_{100–500}$, PNC of particles with $100–500\text{\hspace{0.17em} nm}$ mobility diameter; PSC, particle surface concentration.