Background & Aims: Malnutrition and inflammation adversely affect the prognosis of patients with cancer. The Geriatric Nutritional Risk Index (GNRI) and systemic inflammatory markers, including neutrophil-to-lymphocyte ratio (NLR), lymphocyte-to-monocyte ratio (LMR), lymphocyte-to-C reactive protein ratio (LCR), and C-reactive protein-to-albumin ratio (CAR), predict survival in colorectal cancer (CRC) patients. The present study aimed to examine the association of these two factors with CRC survival.
Methods: Subjects were 433 consecutive CRC patients who underwent curative surgery between 2013 and 2018. Patients were stratified by nutritional status, and relationships between overall survival (OS) and systemic inflammation were evaluated. The prognostic impact of combinations of the GNRI and inflammatory markers was assessed. Multivariable analyses were also performed.
Results: All assessed biomarkers predicted OS in univariable analysis (GNRI:P < 0.001, NLR:P = 0.048, LMR:P = 0.001, LCR:P = 0.010, CAR: P = 0.039). Stratified analysis showed that each inflammatory marker had a prognostic impact on OS in the low GNRI group (NLR:P = 0.028, LMR:P = 0.003, LCR:P = 0.05, CAR:P = 0.009). In contrast, inflammatory markers had no prognostic impact on OS in the high GNRI group. The combination of malnutrition and systemic inflammation had a high prognostic value (all P < 0.016). The multivariable analysis revealed that a low GNRI (hazard ratio: 2.58-2.89) was independently associated with reduced survival, whereas none of the inflammatory markers independently predicted poor prognosis.
Conclusions: The GNRI is a useful prognostic biomarker for CRC patients, whereas systemic inflammatory markers can only serve as prognostic factors when patient nutritional status is taken into account. The combination of malnutrition and systemic inflammation may enhance the accuracy of prognostic prediction.
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