Table 6 Univariate survival analysis and multivariate Cox regression analysis on predictive factors for tumor prognosis

Male, n (%)

18(50.0)

0.642

0.824

Age (years), Mean ± SD

44.0 ± 14.0

0.142

0.266

0.079

0.296

Unconventional pathological types, n (%)

19(33.9)

0.022^*

0.030^*

0.027^*

0.041^*

Intralesional, n (%)

20(35.7)

0.012^*

0.048^*

0.028^*

0.199

Recurrence after previous resection, n (%)

20(35.7)

0.003^**

0.014^*

0.009^**

0.041^*

Preoperative arterial embolization, n (%)

22(39.3)

0.594

0.517

Total operative time (mins), Median (IQR)

357.5(327)

0.479

0.169

0.280

Intraoperative blood loss (ml), Median (IQR)

1000(1575)

0.438

0.691

1 complication, n (%)

17(30.4)

0.544

0.126

0.123

2 complications, n (%)

16(28.6)

0.066

0.235

0.120

0.718

Over 3 complications, n (%)

9(16.1)

0.442

0.240

0.568

Vertebral bodies involved, n (%)

39(69.6)

0.473

0.811

Vertebral accessory structures involved, n (%)

46(82.1)

0.745

0.377

Vertebral Pedicles, n (%)

35(62.5)

0.514

0.296

Cervical vertebra, n (%)

24(42.9)

0.206

0.237

Thoracic vertebra, n (%)

29(51.8)

0.253

0.802

Lumbosacral vertebra, n (%)

9(16.1)

0.236

0.752