Table 4 Cox proportional hazard model using myeloma, spine and being female as reference categories

Primary tumor

Unknown

1.05

0.83–1.32

0.695

Breast

1.53

1.19–1.97

0.001

Prostate

1.48

1.16–1.88

0.002

Kidney

1.46

1.06–2.00

0.021

Lung

3.19

2.47–4.12

 < 0.001

Other

1.43

1.12–1.82

0.004

Myeloma

1

Ref

–

Location of pathological fracture

Upper extremity

1.36

1.06–1.73

0.015

Lower extremity

1.38

1.09–1.75

0.007

Pelvic

0.98

0.69–1.39

0.907

Spine

1

Ref

–

Age (years)

1.03

1.02–1.03

 < 0.001

Sex

Male

1.18

1.01–1.38

0.04

Female

1

Ref

–