Table 2 Significant prognostic factors for overall survival and recurrence

Prior history of benign meningioma

10.46

0.02075

Prior history of benign meningioma

24.9765

0.00938

Prior fractionated RT

5.76

0.0234

Necrosis

5.4325

0.03085

WHO grade III

5.52

0.03137

WHO grade III

31.8875

0.0057

Time from surgery to GK

1.01

0.01902

Nuclear atypia

4.6286

0.015

Isocenter volume

1.04

0.01058

Margin dose

1.0061

0.00051

Tumor volume treated

1.08

0.00824

Mitotic rate

1.1802

0.00742

Tumor volume

1.08

0.00812

Isocenter number

1.17

0.00146