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In May of 2018, the American Cancer Society lowered the age of colorectal cancer (CRC) screening initiation from 50 to 45 years and in October 2020, United States Preventive Services Task Force published draft guidelines also lowering age of screening initiation to 45 years. Evaluating guideline adherence is needed; however, the majority of prior research on cancer screening do not distinguish whether colonoscopy was performed for true screening purposes or for post-symptomatic diagnosis. Using data from the National Health Interview Sur