Oral Antibiotic Use in Adulthood and Risk of Early-Onset Colorectal Cancer: A Case-Control Study

Prior antibiotic use may be a factor in the rising incidence of colorectal cancer seen in those under 50 years of age (early-onset colorectal cancer [EOCRC]); however, the few studies to examine this link have reported conflicting results. Therefore, we evaluated the association between oral antibiotic use in adulthood and EOCRC in a large integrated healthcare system in the United States.