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OS and LCSS of LCBM patients underwent primary lung tumor surgery or not after PSM adjustment. PSM adjusted Kaplan-Meier (K-M) survival analysis: (A) OS of LCBM underwent primary lung tumor surgery or not; (B) LCSS of LCBM underwent primary lung tumor surgery or not. PSM: propensity score matching, OS: overall survival, LCSS: lung cancer specific survival, LCBM: lung cancer brain metastases.
