skip to content National Cancer Institute U.S. National Institutes of Health www.cancer.gov
Division of Cancer Prevention logo
Home Site Map Contact DCP
Skip to subnavigation.
Programs & Resources
Skip to main content.
Early Phase Prevention Trials Consortia

Step 3: Monitoring a Cancer Prevention Clinical Trial

Monitoring Visits


At least once a year, all lead organizations receive a monitoring visit by a Westat clinical research associate. Interim visits can be scheduled as well, particularly if the site is experiencing rapid accrual or protocol deficiencies. The visits usually take 2 or 3 days and are scheduled about 6 weeks in advance.

Site requirements at the time of the visit are:

  • Site monitoring sign-in log
  • PID logbook
  • Case report forms notebooks
  • Binders with copies of signed informed consents for all participants
  • Source documentation such as clinic charts, shadow files, and hospital charts
  • Regulatory documents
  • Appointment to meet with site pharmacist if audit is to be performed
  • Quiet, well lit area for monitor's uses each day

DCP's Study Site Monitoring Manual, Section 9 (pdf, 38kb), describes the three kinds of site visits conducted by NCI's contractor, Westat Clinical Research Associates.

The purpose, scheduling, requirements, conduct, and follow up activities are discussed for:

  • Initiation visits
  • Annual or interim visits
  • Closeout visit

Site initiation visits are discussed in Step 2, Start-up Activities. The closeout visit is discussed in Step 5, Final Report and Site Visit.