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Table 4 Multivariate analysis of risk factors for overall survival (OS)

From: The preliminary results of proton and carbon ion therapy for chordoma and chondrosarcoma of the skull base and cervical spine

 BSEWalddfsignificanceExp(B)
KPS.003.077.0021.9671.003
Critical organ compression11.162195.729.0031.95570,401.455
Cranial nerve injury11.376321.728.0011.97287,178.423
Histology.5001.105.2051.6511.649
Tumor volume2.081.8246.3721.0128.013
Recurrent disease−1.1161.0341.1661.280.327
Re-radiotherapy2.376.8407.9931.00510.759
Surgery−.896.8111.2201.269.408