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.
The comparison of rates for premature and LBWI births among inborns (A), and of mortality rates for premature and LBWIs among NICU patients (B) between 1999 to 2003 (white bar) and 2004 to 2009 (black bar). LBWI: low birth weight infant, NS: not significant.
