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Table 3 Multivariate analysis for OS and EFS

From: The extremity localized classic osteosarcomas have better survival than the axial non-classics

Variable (Category) OS EFS
HR 95% CI P HR 95% CI P
Age (≤ 40 year vs. > 40 year) 1.075 0.393–2.946 0.888 0.959 0.404–2.280 0.925
Tumor site (limb vs. axial) 0.221 0.080–0.609 0.004 0.286 0.123–0.666 0.004
Tumor size (≤ 8 cm vs. > 8 cm) 0.783 0.410–1.494 0.457 0.886 0.510–1.540 0.668
Metastasis (no vs. yes) 0.307 0.142–0.661 0.003 0.441 0.207–0.938 0.034
Surgery (salvage vs. amputation) 0.889 0.445–1.777 0.738 0.730 0.394–1.353 0.318
  1. HR hazard ratio, CI confidence interval, OS overall survival, EFS event-free survival