Research Article
Treatment-Related Prognostic Factors in Managing Osteosarcoma around the Knee with Limb Salvage Surgery: A Lesson from a Long-Term Follow-Up Study
Table 2
Summary of univariate and multivariate Cox proportional hazards model for overall survival. HR: hazards ratio; LRT: likelihood rate testing.
| | Univariate LRT | Multivariate LRT | p values and HR (95%) | p values and HR (95%) |
| Gender | 0.771 | | | female | Ref. | | male | 0.927(0.557-1.543) | | Age at diagnosis | 0.026 | | | 31-59 years old | Ref. | | Ref. | 21-30 years old | 2.849(0.952-8.530) | 0.038 | 2.268(1.065-10.029) | 10-20 years old | 3.686(1.322-10.283) | 0.026 | 3.304(1.156-9.447) | Site | 0.533 | | | distal femur | Ref. | | proximal tibia | 0.845(0.497-1.437) | | Symptom intervals | 0.066 | | 0.193 | | <60 days | Ref. | Ref. | >=60 days | 1.622(0.969-2.715) | 1.443(0.830-2.509) | Pathologic fracture | 0.248 | | | not occurred | Ref. | | occurred | 0.313(0.043-2.260) | | Center performing the biopsy/the tumor resection | 0.044 | | 0.001 | | same | Ref. | Ref. | different | 1.817(1.017-3.247) | 2.797(1.503-5.207) | Previous medical history | 0.045 | | 0.108 | | no | Ref. | Ref. | yes | 1.997(1.016-3.927) | 1.928(0.865-4.294) | Elevated ALP at diagnosis | 0.041 | | 0.013 | | no | Ref. | Ref. | yes | 1.678(1.022-2.756) | 2.001(1.156-3.463) | Bone margin width | 0.701 | | | >=3 cm | Ref. | | >=2 cm | 1.157(0.549-2.436) | | Neurovascular infiltration | 0.049 | | 0.182 | | no | Ref. | Ref. | yes | 1.654(1.003-2.727) | 1.479(0.832-2.628) | Tumor size | 0.034 | | 0.003 | | <10 cm | Ref. | Ref. | >=10 cm | 1.708(1.041-2.802) | 2.199 (1.311-3.690) | Histological subtypes | 0.654 | | | osteoblastic | Ref. | | chondroblastic | 0.765(0.347-1.688) | | fibroblastic | 0.458(0.111-1.884) | | telengiectatic and other | 0.800(0.289-2.216) | | Tumor necrosis | <0.001 | | 0.001 | | >=90% | Ref. | Ref. | <90% | 3.504(1.827-6.720) | 3.287(1.665-6.491) | Preoperative chemotherapy duration | 0.019 | | | 8-12 weeks | Ref. | Ref. | >12 weeks | 1.081(0.556-2.099) | 0.434 | 0.745(0.357-1.556) | <8 weeks | 2.210(1.251-3.903) | 0.008 | 2.249(1.232-4.105) | Preoperative interval | 0.701 | | | <14 days | Ref. | | >=14 days | 0.906(0.547-1.501) | | Postoperative interval | 0.051 | | | <=14 days | Ref. | Ref. | 15-21days | 1.965(0.749-5.153) | 0.051 | 2.687(0.998-7.236) | >21 days | 2.913(1.139-7.451) | 0.036 | 2.844(1.068-7.572) |
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