Diseases of the colon and rectum
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The aim of the study contained herein was to investigate the association between blood transfusion and long-term outcome for patients treated for colorectal cancer, controlling for the effect of other prognostic factors. We also wanted to study whether blood storage time influenced the prognosis. ⋯ We found an independent and significant association between perioperative blood transfusion and poor prognosis in colorectal cancer patients. Blood storage time was not a prognostic factor.