Table 3 The effects of variables upon survival given as proportional hazards calculated using cox regression analysis

Age

  < 65

1

-

1

-

1

-

 65–74

0.6

 < 0.001

0.5

0.01

0.5

0.005

  ≥ 75

0.4

 < 0.001

0.2

 < 0.001

0.2

 < 0.001

Gender

 Female

1

-

1

-

1

-

 Male

1.2

ns

1.3

ns

0.9

ns

Indication

 OA

1

-

1

-

1

-

 Inflammatory Arthropathy

0.9

ns

1.10

ns

7.00 × 10^–1

ns

 AVN

1.7

ns

4.80 × 10^–7

ns

3.50 × 10^–7

ns

 Trauma

3.6

ns

5.1

ns

7.4

ns

 Prev Infection

7.60 × 10^–7

ns

8.70 × 10^–7

ns

7.70 × 10^–7

ns

 Other

7.50 × 10^–7

ns

4.90 × 10^–7

ns

3.80 × 10^–7

ns

ASA

 I

1

-

1

-

1

-

 II

0.7

ns

0.6

0.03

0.6

ns

 II

0.9

ns

0.5

0.04

0.4

0.05

 IV

0.7

ns

3.20 × 10^–7

ns

2.40 × 10^–7

ns

 V

1.02 × 10^–6

ns

1.50 × 10^–6

ns

1.20 × 10^–6

ns

Meniscal Constraint

 Unconstrained Mobile

1

-

1

-

1

-

 Unconstrained Fixed

1.8

0.04

0.6

ns

0.4

ns

 PS mobile

1.8

ns

0.6

ns

0.4

ns

 PS Fixed

0.8

ns

0.07

0.02

0.16

0.04