Table 1 The demographic of the two stem groups

Number of patients

50

53

Number of hips

55

58

Male to female ratio

20:30

10:43

0.18

Mean age (years) (range)

74 ± 13.2

75 ± 10.4

0.320

Mean BMI (kg/m²)

28.1 ± 7.0

29.2 ± 6.1

0.212

Dorr bone quality

0.843

 Type A

18

20

 Type B

14

12

 Type C

23

26

Diagnosis

0.954

 Osteonecrosis

11

12

 Osteoarthritis

32

33

 Rheumatoid arthritis

2

1

 Femoral neck fracture

10

12

Follow-up (months)

40 ± 3.6

42 ± 5.2

0.620