Background: Incidence of colorectal cancer (CRC) in patients under 50 years of age is rising. Quality of life in survivorship is not well-described in this population. We compared health-related quality of life (HRQoL) in CRC survivors ≤ 50 years old who were 6-18 months or 19-36 months from initial diagnosis or relapse. Methods: A cross-sectional online survey was administered in collaboration with a national organization for young CRC survivors. The Functional Assessment of Cancer Therapy (FACT-C) was used to measure HRQoL, which assesses HRQoL globally, including a CRC specific scale, and emotional, physical, social, and functional well-being domains. T-tests were conducted to compare HRQoL between survivors who were 6-18 months versus 19-36 months from diagnosis/relapse. Results: This sample (n=308) had a mean age of 33.76 SD±6.68; 201 (65.3%) were male; tumor location was colon or rectal in 41.7% and 58.3%, respectively. The majority (55.23%) were diagnosed with stage 2 disease; 98.0% were non-metastatic. 42.2% experienced relapse; 25% had an ostomy. Most survivors were 6-18 months (N=189; 61.4%) from diagnosis/relapse, and key demographics and disease characteristics did not significantly differ between those who were shorter versus longer time from diagnosis/relapse. The mean global HRQoL score was 67.3 out of a possible score of 136. Across domains, scores were low, with social well-being the highest (15.15/28) and emotional well-being the lowest (11.44/24). Social well-being was significantly higher among survivors who were 6-18 months from diagnosis/relapse compared to those 19-36 months (15.98 for 6-18 months vs. 13.83 for 19-36; p<0.01), as was functional well-being (13.20 for 6-18 months vs. 11.12 for 19-36; p<0.01). Emotional well-being and physical well-being did not significantly differ between groups. Conclusions: Overall HRQoL scores were low among younger CRC survivors, and social and functional well-being were significantly worse for those longer from diagnosis. Appropriate counseling and other targeted interventions are necessary to maintain HRQoL over time in this at-risk population.

*p<0.05; **p<0.01