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Comparison of the disease-free survival curves of different groups divided by the prognostic nutritional index. A: For all patients, the 5-year disease-free survival rates were 53.5% and 38.3% in the prognostic nutritional index (PNI)-high group and PNI-low group, respectively (P = 0.012); B: For patients with stage T3 or T4 disease (P = 0.002). PNI: Prognostic nutritional index.
