23889952

PMC3839939

Background

Guidelines for post resection surveillance of colorectal cancer recommend a collection of the patient's history and physical examination, testing for carcinoembryonic antigen (CEA), and colonoscopy. No consistent guidelines exist for the use of abdominal computed tomography (CT) and position emission tomography (PET)/PET-CT. The goal of our study was to describe current trends, the impact of oncologic follow-up on guideline adherence, and the patterns of use of nonrecommended tests.

Methods

We used Texas Cancer Registry—Medicare-linked data (2000-2009) to identify physician visits, CEA testing, colonoscopy, abdominal CT, and PET/PET-CT scans in patients ≥66 years old with stage I-III colorectal cancer who underwent curative resection. Compliance with guidelines was assessed with a composite measure of physician visits, CEA tests, and colonoscopy use from start of surveillance.

Results

In patients who survived 3 years, the overall compliance with guidelines was 25.1%. In patients seen regularly by a medical oncologist, compliance with guidelines increased to 61.5% compared with 8.8% for those not seen by a medical oncologist regularly (P < .0001). The use of abdominal CTand PET/PET-CT increased from 57.5% and 9.5%, respectively, in 2001 to 65.8% and 24.6% (P <.0001) in 2006. Patients who saw a medical oncologist were more likely to get cross-sectionalimagingthan those whodid not (P <.0001).

Conclusion

Compliance with current minimum guidelines for post treatment surveillance of colorectal cancer is low and the use of nonrecommended testing has increased over time. Both compliance and use of nonrecommended tests are markedly increased in patients seen by a medical oncologist. The comparative effectiveness of CT and PET/PET-CT in the surveillance of colorectal cancer patients needs further examination.

CDC Public Access

5T32DK007639/DK/NIDDK NIH HHS/United States
5U58/DP000824-05/DP/NCCDPHP CDC HHS/United States
K05 CA134923/CA/NCI NIH HHS/United States
T32 DK007639/DK/NIDDK NIH HHS/United States
UL1 TR000071/TR/NCATS NIH HHS/United States
UL1TR000071/TR/NCATS NIH HHS/United States