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.
Survey response rates. *Found to be ineligible (dead, not rectal cancer, etc) after initial search (B), after wrong address and phone number (D), or after return of survey if patient reported no rectal cancer, no intra-abdominal surgery, and so forth (H).
