Table 1 Patient demographics

Number of patients

17

21

Mean age, years (SD)

40.8 (11)

42 (14)

0.76

Gender (male/female)

16/1

16/5

0.20

Mean BMI, kg/m² (SD)

23.5 (3.3)

22.1 (4.4)

0.24

Mean length of follow-up, months (SD)

78.9 (45)

106.3 (39)

 < 0.05*

Etiology of ONFH

 Steroid/alcoholism/idiopathic

8/ 8/ 1

14/ 7/ 0

0.77

 Approach: posterior (n)

18

28

Femoral component

 Cementless (n)

16

28

0.15

 Cement (n)

2

0