Distance to major road
REGRESSION
Several studies described a significant decrease in PM2.5, ultrafine particles, black carbon, and NOThe strength of our study lies in the cohort of unselected patients from all regions in Germany and the consideration of environmental pollutants, combining the influence of long-term background exposure and likely short-term peak exposure in the vicinity of heavy traffic. Our analysis faces some limitations. The used pollutant exposure refers to the start of the getABI trial. Trends in pollutant values before and after 2001 were ignored. The interpolated pollution data carries a regression to the mean effect, so the spread in values might be underestimated. No data on PM2.5 was considered. Thus, the data compilation has weaknesses, which might have influenced the results, but other options were not available.