Table 3 Comparison of polyethylene wear diagnostic measures between patients with and without pseudotumor

Wear (mm)

1 y

0.46

0.37–0.59

0.53

0.46–0.80

0.06

n/a

5 y

0.80

0.57–0.90

1.23

0.96–1.48

 < 0.001

0.49

10 y

1.00

0.71–1.21

1.67

1.41–1.89

 < 0.001

0.66

15 y

1.20

0.85–1.39

2.02

1.74–2.34

 < 0.001

0.66

Wear rate (mm/y)

5 y

0.17

0.13–0.20

0.26

0.21–0.37

 < 0.001

0.53

10 y

0.10

0.08–0.13

0.17

0.15–0.21

 < 0.001

0.64

15 y

0.08

0.06–0.10

0.14

0.12–0.17

 < 0.001

0.65