Fig. 3
ERs of outpatient visits for total respiratory, lower respiratory, upper respiratory and circulatory diseases. Single air pollutant models (a) and double air pollutant models (b). The ER (%) of the y-axis indicates that a 10 μg/m3 increase in the concentration of air pollutants increases outpatient visits; “01, 02, 03, 04, 05” represent the cumulative lag effect
