Table 1 Demographics data

Number of patients

23

19

Female/male

21/2

19/0

0.492

Age (years)^a

50.8 ± 10.3 (34–69)

40.4 ± 10.2 (22–60)

0.002

BMI (kg/m²)^a

24.3 ± 4.3 (15.2–32.2)

22.1 ± 2.3 (17.6–28.0)

0.050

Mean follow-up (years)^a

5.8 ± 3.3 (1.3–12.0)

6.4 ± 3.8 (1.7–14.7)

0.604

Crowe classification (contralateral hips were all type IV)

 I

0

3

 II

7

0

 III

16

13

 IV

0

3