Abstract
The Gustave Roussy Immune (GRIm) score is aa prognostic marker in various cancer types. The aim of this study was to investigate the relationship between the GRIm score and short- and long-term outcomes in elderly patients with colon cancer. Patients aged ≥75 years who underwent colectomy between 2008 and 2019 were eligible for the study. Patients were divided into high GRIm (score 1-3) and low GRIm (score 0) groups. A total of 430 patients were enrolled (high GRIm, n=126; low GRIm, n=304). A high GRIm score was an independent predictive factor for postoperative complications [odds ratio=4.146; 95% confidence interval (CI)-2.536-6.777; p<0.001]. The median follow-up was 42 months (range=1-160 months). Five-year relapse-free (79.3% vs. 92.7%; p=0.001), overall (76.0% vs. 92.2%, p=0.001), and non-cancer-specific (84.7% vs. 94.6%, p=0.003) survival were lower in the high GRIm group. Multivariate analysis revealed a high GRIm score to be an independent predictive factor for poorer overall (hazard ratio=2.875; 95% CI=1.451-5.698; p=0.002) and non-cancer-specific (hazard ratio=3.650; 95% CI=1.612-8.265; p=0.001) survival. The GRIm score is useful for predicting postoperative complications and non-cancer cause of death in elderly patients and might be suitable as a surrogate marker for selecting candidates for surgery or perioperative treatment.
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