Table 3 Pairwise comparisons of survival between subgroups

Histology

 Adeno vs Non-adeno

8.7

0.003*

Sex

 F vs M

1.5

0.220

Age (year)

 ≤54 vs 55–74

0.19

0.660

 ≤54 vs ≥75

7.3

0.007*

 55–74 vs ≥75

6.41

0.010*

Pre-op PS

 0 vs 1

0.45

0.500

 0 vs 2

13.44

<0.001*

 1 vs 2

13.99

<0.001*

Pre-op palsy

 0 vs 1

0.027

0.870

Post-op palsy

 0 vs 1

1.95

0.160

 0 vs 2

6

0.010*

 1 vs 2

9.12

0.003*

BMI

 1 vs 2

0.02

0.878

 1 vs 3

1.07

0.301

 2 vs 3

0.97

0.324

Number of vertebra involved

 <3 vs ≥3

0.23

0.630

Other bone metastasis

 Without vs with

0.05

0.818

Visceral metastasis

 Without vs with

0.33

0.567