Table 2 Comparison of different Crowe types at 5 years after THA

Hip operation history (no. [%])

10

14

16

43

.663

Unilateral DDH

 Postoperative inpatient days^† (d)

10.39 ± 6.00

7.89 ± 2.76

8.24 ± 4.49

9.43 ± 4.26

.069

 Surgical time^† (min)

125.78 ± 46.29

148.47 ± 65.07

133.51 ± 48.71

168.86 ± 65.89

.000*

 Blood loss^† (mL)

442.61 ± 343.38

442.22 ± 310.05

497.96 ± 362.57

616.21 ± 455.02

.013*

 Blood transfusion^† (mL)

235.87 ± 356.50

335.44 ± 423.07

206.73 ± 297.89

510.07 ± 718.81

.002*

Osteotomy (no. [%])

0

9

11

124

.000*

Osteotomy length^† (cm)

0

2.11 ± 1.29

2.32 ± 0.93

3.44 ± 1.20

.000*

Acetabular prosthesis position (no. [%])

.000*

 Crowe I

44

56

43

197

 Crowe II

21

5

20

11

 Crowe III

0

0

6

3

 Crowe IV

0

0

0

1

Acetabular prosthesis (no. [%])

.000*

 Duraloc

12

13

20

66

 Betacup

29

20

7

5

 Combicup

15

17

27

53

 Pinnacle

9

11

15

88

Femoral prosthesis (no. [%])

.000*

 LCU

31

28

27

18

 S-Rom

34

29

40

169

 Corail

0

4

2

25

Acetabular liner (no. [%])

.177

 MOP

3

3

6

22

 3rd-COC

7

10

6

39

 4th-COC

55

48

57

151

Revision hip (no. [%])

.449

 Periprosthetic fractures

0

0

2

3

 Periprosthetic infection

0

0

0

1

 Polyethylene lining wear

0

0

0

2

Complications (no. [%])

.826

 Postoperative dislocation

0

0

0

2

 Limited flexion

0

0

0

2

 Limp

28

19

21

72

 Knee valgus

13

8

9

46

 Knee pain

2

1

3

3

 Thigh pain (distal femoral prosthesis)

4

1

2

4

 Hip abnormal noise

3

1

2

13