Fig. 2
Estimated changes with 95% confidence interval in years of life lost and excess risk of deaths from chronic obstructive pulmonary disease associated with 10 μg/m3 increase in PM2.5 and PM10 in different lag days in Ningbo, China, 2011–2015. Results were adjusted for seasonality, day of the week, temperature and relative humidity (a Estimated changes in years of life lost associated with PM2.5; b Estimated changes in years of life lost associated with PM10; c Excess risk of deaths associated with PM2.5; d Excess risk of deaths associated with PM10)