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.
Prevalence of vitamin D insufficiency in cases and controls in the total (A), male (B), and female (C). Chi-square tests were used to compare the differences in the prevalence of vitamin D insufficiency between cases and controls. There were no significant differences in the prevalence of vitamin D insufficiency between cases and controls in the total, male, and female (all P > 0.05). Vitamin D groups: vitamin D insufficiency (50–75nmol/L); vitamin D sufficiency (>75nmol/L).
