Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Distributions of Distance to Roadway and the Annual Average of PM2.5 in 2008
| Distance to major roadway, m, median (IQRw)a | 214 (363) |
|---|---|
| Distance to roadway in categoriesa, % | |
| <100 m | 31 |
| 100-<200 m | 16 |
| 200-<400 m | 24 |
| 400-<1,000 m | 27 |
| PM2.5, μg/m3, median (IQRw) | 9.7 (1.6) |
321 participants (11.7 %) who lived ≥1,000m from a major roadway were excluded from the distance to roadway primary analyses. IQRw indicates interquartile range width.
