Patients and Methods: This study was a cohort study
within a large, randomized adjuvant chemotherapy trial of
3,759 patients with high-risk stage II and stage III colon cancer
treated between 1988 and 1992 throughout the United
States. In the cohort, 287 patients were identified as having
diabetes mellitus. With a median follow-up of 9.4 years, we
analyzed differences in overall survival (OS) and colon cancer
recurrence as well as treatment-related toxicity between patients with diabetes and those without diabetes