Objective: To investigate the prognostic values of the preoperative modified Glasgow Prognostic Score (mGPS) and carcinoembryonic antigen (CEA) alone and combined in elderly patients with colorectal cancer (CRC) planning to receive curative surgery. Methods: We retrospectively analyzed 130 elderly patients (aged ≥80 years) with CRC who received curative surgery between 2008 and 2016. The preoperative mGPS and CEA levels were calculated. Results: Elevated preoperative mGPS or CEA level was significantly associated with shorter relapse-free survival (p = 0.005, both) and cancer-specific survival (p = 0.011 and p < 0.001, respectively). Combined use of these two factors improved the predictive accuracy for tumor recurrence relative to that of either factor. Conclusion: Both mGPS and CEA were independent prognostic factors of CRC in elderly patients receiving curative surgery, but their combination was more accurate.

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