Abstract
PurposeTo determine the relationship between the receipt of colony-stimulating factors (CSFs) with erythropoiesis-stimulating agents (ESAs) and the risk of developing venous thromboembolism (VTE), stroke, heart disease, and myelodysplastic syndrome (MDS) in patients with colorectal cancer. MethodsWe studied 80,925 patients diagnosed with colorectal cancer at age ≥ 65 years in 1992-2009 from the nationwide 16 areas of the Surveillance, Epidemiology, and End Results (SEER)-Medicare linked data. Cumulative incidence and the time to events Cox hazard regressions were used to explore the risks of outcomes in association with the receipt of CSFs and ESAs. ResultsPatients who received chemotherapy (CT) with both CSF and ESA were 58% more likely to develop VTE than those who received CT without CSF and ESA (hazard ratio, 1.58; 95% confidence interval, 1.43-1.76). The risk of stroke appeared to be not associated with the use of CSF and ESA, whereas the risk of heart disease was only significantly elevated in those patients who did not receive CT but received ESA. The risk of acute myeloid leukemia or MDS was significantly increased 4- to 9-fold in patients who received ESA, regardless of receipt of CT or CSF. ConclusionThe use of ESAs was significantly associated with a substantially increased risk of MDS in patients with colorectal cancer. The use of CSFs and ESAs was also significantly associated with a moderately increased risk of VTE and a slightly elevated risk of heart disease.
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