Table 2 Risk factors associated with symptomatic pseudotumors

 Female

15

34

0.154

 Male

1

12

Age (years)^a

63.1

64.1

0.803

BMI (kg/m²)^a

25.4

23.4

0.036

Head diameter (mm)^a

42.6

41.7

0.454

Cup inclination (°)^a

45.2

43.5

0.790

Cup anteversion (°)^a

14.1

13.3

0.494

Time of MRI screening (months)^a

45.7

49.7

0.359

Pseudotumor size (mm²)^a

1812

642

0.003

 Anterior

10

13

0.019

 Posterolateral

6

33

 Cystic

4

31

0.007

 Mixed cystic solid and solid

12

15

 Decreased

2

6

0.083

 Increased

4

8

 No change

0

13

Cobalt level (μg/L)^a

11.7

8.8

0.176

Chromium level (μg/L)^a

10.3

6.2

0.171