Table 3.
Estimated increment in air pollution levels (μg/m3 for PM2.5 and ppb for NO2) across quartiles for women who delivered at that hospitala
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.