APOA1 and neoplasm: The univariate Cox proportional hazards model showed that tumor size (P = 0.017), Enneking stage (P < 0.001), pathological fracture (P < 0.001), local recurrence (P = 0.001), metastasis (P < 0.001), PAR (P < 0.001), PLR (P = 0.019), LDL-C/HDL-C (P = 0.033), and ApoB/ApoA1 (P < 0.001), were significantly associated with OS (Table 4).