Table 3 Postoperative mortality

Age at surgery

1.078 (1.022–1.136)

0.006

1.070 (1.005–1.139)

0.035

Sex (f/m)

1.180 (0.688–2.024)

0.547

1.455 (0.773–2.737)

0.245

 Other vs Biopsy

3.715 (2.140–6.450)

< 0.001

2.575 (1.341–4.944)

0.004

< 0.001^#

  Resection vs Biopsy

2.646 (1.414–4.950)

0.002

  Radical resection vs Biopsy

6.211 (2.597–14.925)

< 0.001

0.001^#

0.003^#

 0–1 vs 2

2.497 (1.260–4.949)

0.009

2.023 (0.964–4.249)

0.063

 0–1 vs 3–4

5.518 (2.774–10.974)

< 0.001

4.034 (1.827–8.908)

0.001

 Symptoms present

1.981 (0.449–8.742)

0.367

3.714 (0.744–18.544)

0.110

  Focal deficit

0.724 (0.351–1.497)

0.384

  Seizures

3.086 (1.310–7.265)

0.010

  Symptoms of ICP

0.852 (0.494–1.470)

0.565

 Other vs Multifocal tumour

1.758 (0.994–3.107)

0.052

1.324 (0.661–2.652)

0.428

Tumour size

0.777^#

0.385^#

  < 4 cm vs 4-6 cm

1.135 (0.623–2.067)

0.678

1.135 (0.586–2.199)

0.707

  < 4 cm vs > 6 cm

0.845 (0.350–2.040)

0.709

0.575 (0.209–1.584)

0.284

Year of surgery

0.132^#

0.363^#

 2006 vs 2007

0.470 (0.108–2.039)

0.313

0.534 (0.084–3.417)

0.508

 2006 vs 2008

1.907 (0.630–5.774)

0.254

2.087 (0.503–8.654)

0.311

 2006 vs 2009

0.907 (0.265–3.102)

0.876

1.443 (0.332–6.273)

0.625

 2006 vs 2010

0.929 (0.292–2.957)

0.900

0.922 (0.218–3.893)

0.912

 2006 vs 2011

0.752 (0.230–2.464)

0.638

0.994 (0.237–4.167)

0.993

 2006 vs 2012

0.333 (0.077–1.440)

0.141

0.483 (0.091–2.570)

0.394

 2006 vs 2013

0.317 (0.073–1.369)

0.124

0.319 (0.059–1.736)

0.186

 2006 vs 2014

0.614 (0.181–2.088)

0.435

0.908 (0.211–3.911)

0.897

 2006 vs 2015

0.727 (0.229–2.309)

0.589

0.952 (0.193–4.708)

0.952