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 3
Summary of univariate and multivariate Cox proportional hazards models for LR. HR: hazards ratio; LRT: likelihood rate testing.
| | Univariate LRT | Multivariate LRT | p values and HR (95%) | p values and HR (95%) |
| Gender | 0.241 | | | female | Ref. | | male | 0.625(0.285-1.370) | | Age at diagnosis | 0.544 | | | 31-59 years old | Ref. | | | 21-30 years old | 1.947(0.527-7.194) | | | 10-20 years old | 1.366(0.389-4.794) | | | Site | 0.678 | | | distal femur | Ref. | | proximal tibia | 0.837(0.361-1.940) | | Symptom intervals | 0.480 | | | <60 days | Ref. | | >=60 days | 1.334(0.599-2.971) | | Pathologic fracture | 0.464 | | | not occurred | Ref. | | occurred | 0.046(0-171.359) | | Center performing the biopsy/the tumor resection | <0.001 | | 0.002 | | same | Ref. | Ref. | different | 4.601(2.082-10.169) | 4.099(1.649-10.192) | Previous medical history | 0.060 | | 0.931 | | no | Ref. | Ref. | yes | 2.561(0.960-6.835) | 0.951(0.308-2.942) | Initial raised ALP | 0.301 | | | | no | Ref. | | yes | 1.517(0.688-3.344 ) | | Bone margin width | 0.895 | | | >=3 cm | Ref. | | >=2 cm | 1.084(0.325-3.624) | | Neurovascular infiltration | 0.007 | | 0.163 | | no | Ref. | Ref. | yes | 4.140(1.826-9.388) | 1.838(0.782-4.320) | Tumor size | 0.070 | | 0.152 | | <10 cm | Ref. | Ref. | >=10 cm | 2.080(0.043-4.589) | 1.871(0.795-4.405) | Histological subtypes | 0.340 | | | osteoblastic | Ref. | | chondroblastic | 0.261(0.035-1.944) | | fibroblastic | 1.922(0.571-6.470) | | telengiectatic and other | 0.477(0.064-3.555) | | Tumor necrosis | 0.014 | | 0.022 | | >=90% | Ref. | Ref. | <90% | 3.802(1.304-11.087) | 3.536(1.198-10.438) | Preoperative chemotherapy duration | 0.783 | | | 8-12 weeks | Ref. | | >12 weeks | 0.694(0.234-2.063) | | | <8 weeks | 0.818(0.275-2.432) | | | Preoperative interval | 0.336 | | | <14 days | Ref. | | >=14 days | 1.469(0.670-3.220) | | Postoperative interval | 0.761 | | | <=14 days | Ref. | | 15-21days | 0.934(0.288-3.034) | | | >21 days | 1.278(0.412-3.964) | | |
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