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Overall survival between lobectomy group (233 patients) and segmentectomy group (31 patients) from Shandong Provincial Hospital (A). There was no significant difference in OS [HR: 1.979 (0.814–4.813), P=0.132]. OS in each regional lymph node removed layer was presented (B-D). There was no significant difference in each regional lymph node removed layer (no Reg. LN removed: P=0.182; 1–3: P=0.590; more than 3: 0.203). HR, hazard ratio; OS, overall survival; Reg. LN, regional lymph node.
