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Kaplan–Meier estimates of overall survival (OS) according to the main clinical variables status:(a) according to age status (P=0.004), (b) according to sex status (P=0.01), (c) according to tumor size status (P=0.829), (d) according to primary site status (P=0.144), (e) according to stage status (P=0.0036), (f) according to CEA + NLR (P < 0.001), (g) according to CEA + PLR (P < 0.001), (h) according to NLR + PLR (P < 0.001), and (i) according to CEA + NLR + PLR (P < 0.001).
