Table I. Participants’ demographic characteristics.
Values represented as mean±standard deviation. *Patients in early group were significantly older than those in late group. The age of patients in middle group did not differ from other two groups.
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.