Table 1 Demographic overview

Mean age at surgery in years (range)

65.1 (52.8–70)

63.8 (52.8–70)

67.1 (53.3–69.7)

Weight in kg (range)

85.4 (58–120)

81.6 (58–114)

92 (75–120)

BMI (range)

29.2 (18.5–41.5)

29.1 (18.5–38)

30 (23.2–41.5)

 Never:

15

9

6

 Current:

4

2

2

 Former:

10

6

4

 General:

10

6

4

 Spinal:

19

11

8

Polyethylene inserts in mean mm (range)

12 (10–16)

12 (10–14)

12 (10–16)

 32:

7

6

1

 35:

17

11

6

 38:

5

–

5

 5:

2

1

1

 6:

3

3

–

 7:

5

4

1

 8:

6

4

2

 9:

6

5

1

 10:

2

–

2

 11:

5

–

5

Tibia component size

 D:

5

5

–

 E:

8

7

1

 F:

7

5

2

 G:

7

–

7

 H:

2

–

2