Table 4

Final Multivariable Cox Regression Model Results.

Model Parameter

Reference or Units

Hazard Ratio (95% C.I.)

P-Value

Nitrous Oxide

Nitrogen

1.10 (0.66, 1.83)

0.72

Age

10 Years

1.16 (0.93, 1.44)

0.18

Tumor Grade

1

0.73 (0.43, 1.25)

0.25

Dissemination (Yes)

No

5.6 (3.1, 10.2)

< 0.001

Invasion into Adjacent Organs (Yes)

No

0.60 (0.30, 1.23)

0.16

Invasion into Vessels (Yes)

No

1.54 (0.87, 2.70)

0.14

# involved Nodes

1 Node

1.16 (1.09, 1.24)

< 0.001*

Fleischmann et al. BMC Anesthesiology 2009 9:1   doi:10.1186/1471-2253-9-1