Abstract
To examine the association between tumor/host factors (including the systemic inflammatory response), mode of presentation, and short/long-term outcomes in patients undergoing curative resectional surgery for TNM I to III colon cancer. Emergency presentations of colon cancer are associated with worse long-term outcomes than elective presentations despite adjustment for TNM stage. A number of differences in tumor and host factors have been identified between elective and emergency presentations and it may be these factors that are associated with adverse outcomes. Patients undergoing curative surgery for TNM I to III colon cancer in the West of Scotland from 2011 to 2014 were identified. Tumor/host factors independently associated with the emergency presentation were identified and entered into a subsequent survival model to determine those that were independently associated with overall survival/cancer-specific survival (OS/CSS). A total of 2705 patients were identified. The emergency presentation was associated with a worse 3-year OS and CSS compared with elective presentations (70% vs 86% and 91% vs 75%). T stage, age, systemic inflammatory grade, anemia (all P < 0.001), N stage ( P = 0.077), extramural venous invasion ( P = 0.003), body mass index ( P = 0.001), and American Society of Anesthesiologists Classification classification ( P = 0.021) were independently associated with emergency presentation. Of these, body mass index [hazard ratio (HR), 0.82], American Society of Anesthesiologists Classification (HR, 1.45), anemia (HR, 1.29), systemic inflammatory grade (HR. 1.11), T stage (HR, 1.57), N stage (HR, 1.80), and adjuvant chemotherapy (HR, 0.47) were independently associated with OS. Similar results were observed for CSS. Within patients undergoing curative surgery for colon cancer, the emergency presentation was not independently associated with worse OS/CSS. Rather, a combination of tumor and host factors account for the worse outcomes observed.
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