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.
Data are presented as median (percentile 25, percentile 75) for non-normally distributed variables.
Infant: 6 months-1 year old, toddler: 1-2 years old, preschooler: 3-5 years old.
NS: not significant.
*By Kruskal-Wallis nonparametric test.
a,bDifferent alphabets at same row are different by Scheffe's test using ranks for non-normally distributed variables (p<0.05).
