Abstract 3464: Low concordance with CEA tumor marker monitoring in colorectal cancer survivors

Purpose: To assess providers’ concordance with surveillance and risk reduction recommendations for colorectal cancer (CRC) survivors after completion of their curative treatment. Patients and Methods: This was a longitudinal study of survivors who met the following eligibility criteria: diagnosed with a primary colon or rectal cancer before their first visit (V) to the CRC Survivorship Clinic, adult survivor ≥ 18 years old, no evidence of disease, alive at the time of data abstraction, and 1-3 clinic visits between 9/01/2011 and 8/31/2014. Data were collected at V1 scheduled between 9/1/2011 and 8/31/2012. V2 was scheduled 9-15 months after the first visit. V3 was also scheduled 9-15 months after V2. Data sources were survivorship care plans, electronic medical records, and CRC survivorship algorithms. For an annual visit, CRC algorithms recommended history/physical exams (H & PEs), carcinoembryonic antigen (CEA) testing when previously elevated, and colonoscopies for surveillance of cancer recurrence. Concordance rates (CR) were measured as the percent of yes/no responses to whether the providers followed minimum standards for the 3 procedures. Demographic and clinical characteristics were also collected. Descriptive statistics were used to summarize all data. Results: 81 of 117 CRC survivors who met all eligibility criteria were included in this sub-analysis. The number of survivors visits varied across time, V1 = 81, V2 = 56, and V3 = 36. Most survivors were male (51.9%) and Caucasian (66.7%). 67.9% reported being 5-8 years post-treatment. 58% were diagnosed with colon cancer and of those 61.7% were Stage IIIA-IV compared to 55.8% of rectal cancer survivors with advanced disease. Table 1 summarizes the percentage of CR rates across the 3 visits. Conclusion: CRs for H & PEs and colonoscopies remained high across the 3 visits. CRs were lowest for CEA recommendations. These low rates suggest further work is needed to determine barriers in clinical practice that limit use of CEA tumor marker monitoring in CRC survivors. Citation Format: Guadalupe Palos, Katherine R. Gilmore, Patricia Chapman, Paula Lewis-Patterson, Weiqi Bi, Maria Alma Rodriguez. Low concordance with CEA tumor marker monitoring in colorectal cancer survivors. [abstract]. In: Proceedings of the 107th Annual Meeting of the American Association for Cancer Research; 2016 Apr 16-20; New Orleans, LA. Philadelphia (PA): AACR; Cancer Res 2016;76(14 Suppl):Abstract nr 3464.