Table 1 Comparison of the baseline data of the patients between the two groups

Pipkin classification

0.986

 Pipkin type I

7

7

 Pipkin type II

16

12

 Pipkin type III

6

5

 Pipkin type IV

10

8

Age (years)

42.6 ± 13.6

39.2 ± 12.7

0.275

Gender (male/female)

24/15

24/8

0.309

Side(right/left)

21/18

15/17

0.637

Causes

0.665

 Traffic accident

29

23

 Falling from height

5

5

 Heavy pound injury

3

4

 Sport injury

2

0

Reduction method

0.454

 Closed reduction

36

27

 Open reduction

3

5

Time to reduction(hours)

4.2 ± 1.2

10.0 ± 1.6

<0.001

Surgical approach^a

 Modified Heuter approach

15

10

0.531

 Kocher-Langenbeck approach

8

9

Operative time (min)

146.5 ± 48.0

147.3 ± 54.6

0.945

Blood loss (ml)

305.6 ± 179.6

350.7 ± 214.3

0.338

Follow-up duration (months)

66.3 ± 8.4

67.9 ± 9.0

0.420