Background: Some guidelines advise adjuvant chemotherapy be considered after surgical resection for high-risk stage II colon cancer patients; however, high-risk criteria are poorly defined and the long-term benefits are still debated. This study documents patterns of care by selected patient and tumor characteristics using a US population-based cohort of stage II colon cancer patients diagnosed in 2011.
Methods: Data were collected from 10 specialized cancer registries participating in the Centers for Disease Control and Prevention's National Program of Cancer Registries' Enhancing Cancer Registry Data for Comparative Effectiveness Research project.