Figure 2.
Frequency of healthy children and adolescents with different levels of vitamin D (n, %) in different regions. *p1–2 < 0.05 and p2–3 < 0.05 are Z criteria for comparing the proportions of children.
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.