Table 7.

Prognostic factors of survival in the univariate and multivariate analysis

Author	Univariate analysis	Multivariate analysis
Lei M	Preoperative ambulatory status, targeted therapy, preoperative ECOG PS, number of involved vertebrae, visceral metastases, time developing neurologic deficits	Preoperative ambulatory status, targeted therapy, number of involved vertebrae, visceral metastasis, time developing neurologicr deficits
Chen YJ	Histology of primary tumor, preoperative Karnofsky PS, postoperative Frankel grade	Preoperative Karnofsky PS
Park SJ	Time developing neurologic deficits, responsiveness to preoperative chemotherapy, postoperative chemotherapy, postoperative ECOG PS, postoperative ambulatory status	Time developing neurologic deficits, postoperative chemotherapy, postoperative ECOG PS
Zairi F	Preoperative Karnofsky PS, preoperative Frankel grade, the delay between the cancer diagnosis and the occurrence of spine metastases	–
Tang Y	Bisphosphonate treatment, radiotherapy, targted therapy, postoperative Frankel grade	Radiotherapy, targted therapy, postoperative Frankel grade
Chen Q	Age, extraspinal bone metastasis foci, visceral metastasis, preoperative Frankel grade, targeted therapy, radiotherapy	Age, extraspinal bone metastasis foci, visceral metastasis, preoperative Frankel grade, chemotherapy, targeted therapy
Truong VT	Tobacco use, preoperative and postoperative ASIA score, postoperative ambulatory status, postoperative radiotherapy, and postoperative chemotherapy	Tobacco use, postoperative ambulatory status, postoperative radiotherapy, and postoperative chemotherapy
Tancioni F	Control of the primary tumor, the delay between the cancer diagnosis and the occurrence of spine metastases, visceral metastases, number of involved vertebrae, extraspinal bone metastasis foci	–
Jung JM	Charlson comorbidity index, number of involved vertebrae	–

ECOG Eastern Cooperative Oncology Group, PS performance status, ASIA American Spinal Injury Association