Measuring the Quality of Colorectal Cancer Screening: The Importance of Follow-Up

Purpose As evidence mounts for effectiveness, an increasing proportion of the United States population undergoes colorectal cancer screening. However, relatively little is known about rates of follow-up after abnormal results from initial screening tests. This study examines patterns of colorectal cancer screening and follow-up within the nation's largest integrated health care system: the Veterans Health Administration. Methods We obtained information about patients who received colorectal cancer screening in the Veterans Health Administration from an existing quality improvement program and from the Veterans Health Administration's electronic medical record. Linking these data, we analyzed receipt of screening and follow-up testing after a positive fecal occult blood test. Results A total of 39,870 patients met criteria for colorectal cancer screening; of these 61 percent were screened. Screening was more likely in patients aged 70 to 80 years than in those younger or older. Female gender (relative risk, 0.92; 95 percent confidence interval, 0.9–0.95), Black race (relative risk, 0.92; 95 percent confidence interval, 0.89–0.96), lower income, and infrequent primary care visits were associated with lower likelihood of screening. Of those patients with a positive fecal occult blood test (n = 313), 59 percent received a follow-up barium enema or colonoscopy. Patient-level factors did not predict receipt of a follow-up test. Conclusions The Veterans Health Administration rates for colorectal cancer screening are significantly higher than the national average. However, 41 percent of patients with positive fecal occult blood tests failed to receive follow-up testing. Efforts to measure the quality of colorectal cancer screening programs should focus on the entire diagnostic process. Supported by the Robert Wood Johnson Foundation Clinical Scholars Program (Etzioni), Department of Veterans Affairs (VA) Health Services Research and Development (HSR&D), and National Cancer Institute Colorectal Cancer (CRC) Quality Enhancement Research Initiative (QUERI) Service Directed Research (Project # CRS 02-163). The views expressed in this article are those of the authors and do not necessarily represent the views of the Robert Wood Johnson Foundation or the Department of Veterans Affairs.