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.
Mean (SE) pain intensity during three-month segments. (A) Improved pain group vs comparison group; (B) worsened pain group vs comparison group. A pain intensity of 1 represents no pain and 5 represents moderate to severe pain with extreme bother.
