Disparate Outcomes in Patients With Colorectal Cancer: Effect of Race on Long-term Survival

Background Increasing evidence suggests significant disparity in colorectal cancer outcomes between black and white patients. Contributing factors may include advanced tumor stage at diagnosis, differences in treatment, more aggressive tumor biology, access to care, and patient comorbidity. Hypothesis Disparities in colorectal cancer outcomes exist despite similar objective measures of treatment. Design and Setting Ten-year retrospective review of all patients with colorectal cancer using tumor registries at a city hospital (n = 83) and a university medical center (n = 585) in the same city. We assessed stage at diagnosis; curative surgical resection; use of adjuvant treatment; overall, disease-free, and stage-specific survival; and socioeconomic status. Patients with nonwhite, nonblack ethnicity (4% overall) were excluded. Differences in stage and treatments were compared using the χ 2 test, and median survival rates were compared using log-rank tests. Results Significantly more black patients were treated at the city hospital (53.0%) vs the university medical center (10.6%) ( P P P Conclusion The marked reductions in overall and disease-free survival for black patients with colorectal cancer do not seem to be related to variation in treatment but may be due to biologic factors or non–cancer-related health conditions.