Table 1 Baseline Characteristics of all included patients

M/F

10/1

10/2

-

-

Height (cm)

161.9 ± 9.0

160.0 ± 5.1

0.88

0.37

Weight (Kg)

59.9 ± 10.7

58.1 ± 6.6

0.69

0.50

BMI (Kg/m²)

22.7 ± 3.3

22.7 ± 2.5

-0.02

0.98

Friction couples

 Ceramic-on ceramic

18

18

-

-

 Ceramic-on-polyethylene

4

6

-

-

 Additional screws fixation (patients/hips)

5/10

6/12

-

-

 Average follow-up time (months)

81.9 ± 36.3

79.9 ± 29.1

0.21

0.84