3,200
Participants
Start Date
October 31, 1993
Primary Completion Date
February 28, 2007
Study Completion Date
February 28, 2007
Colonoscopy
Phase I - Cross-sectional; Phase II - 5 year follow-up; Phase III - 10 year follow-up
VA Medical Center, Durham, Durham
VA Medical Center, Minneapolis, Minneapolis
VA Medical Center, Kansas City MO, Kansas City
VA North Texas Health Care System, Dallas, Dallas
VA Eastern Colorado Health Care System, Denver, Denver
Carl T. Hayden VA Medical Center, Phoenix
Southern Arizona VA Health Care System, Tucson, Tucson
VA Medical Center, Long Beach, Long Beach
VA Medical Center, San Francisco, San Francisco
VA Palo Alto Health Care System, Palo Alto
Edward Hines, Jr. VA Hospital, Hines
VA Medical Center, Portland, Portland
VA Medical & Regional Office Center, White River, White River Junction
US Department of Veterans Affairs
FED