Fig. 3

Percent increase (excess risk, ER) with different lag structures for total outpatient admissions (three hospitals) due to fossil fuel-related air pollutants. ER for every unit (10 μg/m³) increase in NO₂, PM2.5, and SO₂ concentrations and for every 1 mg/m³ increase in CO concentration. ER values obtained by single-pollutant regression. The X-axis represents ER values and the Y-axis is the different lag structures. Red bars indicate 95% confidence intervals of ER. Lag1 to Lag6 are simple lag effects and Lag2MA to Lag6MA are 2-day to 6-day cumulative effects