Table 2 Clinical outcomes of all included patients preoperatively and postoperatively

Preoperative hip contracture (°)

39.3 ± 20.3

37.7 ± 18.7

0.28

0.40

Preoperative HHS

30.5 ± 5.9

31.4 ± 4.6

-0.62

0.58

Postoperative HHS

84.0 ± 2.8

83.4 ± 2.0

0.89

0.38

Postoperative extension (°)

0.73 ± 2.4

0.54 ± 1.9

0.29

0.77

Postoperative flexion (°)

86.5 ± 4.4

85.7 ± 3.5

0.67

0.50

Postoperative ROM (°)

85.7 ± 4.5

85.1 ± 4.1

0.47

0.64

Time of walking for the first time postoperatively

5.1 ± 2.6

3.6 ± 1.2

2.43

0.02*

average blood transfusions (U)

3 ± 3.97

0.71 ± 1.99

2.29

0.028*

blood transfusion rate

8/11(72.7 %)

5/24 (20.8 %)

-

-