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.
Birth size (weight SDS versus length SDS) of the study population. Children in the model group are shown as open circles, children in the validation group as open triangles and children born preterm as diamonds. Note the wide range of birth size and the continuous distribution.
