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The overall survival curve of ESCC patients with different levels of T-CTLA-4, I-CTLA-4, and PLR. The Kaplan-Meier survival curve for patients with ESCC whose tumors were classified as either higher or lower level for T-CTLA-4, I-CTLA-4, and PLR, respectively. T-CTLA-4 (p = 0.453), I-CTLA-4 (p = 0.654), and PLR (p = 0.703) status did not demonstrate a significant relation with patient survival.
