Table 4 Comparison of baseline and clinical outcome of conversion THA group and primary THA group

No. of hips

12

57

–

Age (year, mean ± SD, [range])

44.0 ± 10.0 (31–63)

42.7 ± 13.7 (20–71)

p = 0.97

Gender (female/male)

4/8

25/32

p = 0.78

Follow-up time (year, mean ± SD, [range])

66.9 ± 31.7

75.4 ± 14.9

p = 0.15

Etiology

p = 0.42

 Alcohol

3

13

 Corticosteriod

8

37

 Idiopathic

1

17

ARCO stage

p = 0.71

 Stage III

2

15

 Stage IV

10

42

JIC classification

p = 0.51

 Type C1

5

18

 Type C2

7

39

 Pre-op

56 (50–59)

56 (42–66)

p = 0.41

 36 months Pos-op

91 (87–94)

94 (85–98)

p = 0.31

 60 months Pos-op

88 (85–93)

92 (88–96)

p = 0.09