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Table 3 Risk factor analysis of complications (any, including avascular necrosis and heterotropic ossification) (N = 34)

From: Safety of surgical hip dislocation in femoral head fracture and dislocation (FHFD) and avascular necrosis risk factor analysis of FHFD: midterm results confirmed by SPECT/CT and MRI

Variable

Total

No

Yes

p value

Sex, n (%)

    

 Female

6 (100%)

5 (83.3%)

1 (16.7%)

0.237

 Male

28 (100%)

16 (57.1%)

12 (42.9%)

Age (years)

37.91 ± 15.87 (16–77)

39.38 ± 16.38 (16–77)

35.54 ± 15.35 (17–65)

0.478

Injury mechanism

    

 Traffic accident

32 (100%)

20(62.5%)

12 (37.5%)

0.626

 Fall

2 (100%)

1 (50.0%)

1 (50.0%)

Combined injury

    

 No

16 (100%)

12 (75.0%)

4 (25.0%)

0.126

 Yes

18 (100%)

9 (50.0%)

9 (50.0%)

Pipkin classification

    

 II

7 (100%)

5 (71.4%)

2 (28.6%)

0.808

 III

2 (100%)

1 (50.0%)

1 (50.0%)

 IV

25 (100%)

15 (60.0%)

10 (40.0%)

Femoral neck fracture

    

 No

31 (100%)

20 (64.5%)

11 (35.5%)

0.322

 Yes

3 (100%)

1 (33.3%)

2 (66.7%)

Acetabular fracture

    

 No

9 (100%)

6 (66.7%)

3 (33.3%)

0.525

 Yes

25 (100%)

15 (60.0%)

10 (40.0%)

Closed reduction

    

 Failed

6 (100%)

2 (33.3%)

4 (66.7%)

0.136

 Within 6 h

17 (100%)

10 (58.8%)

7 (41.2%)

 After 6 h

11 (100%)

9 (81.8%)

2 (18.2%)

Bone union (months)

6.24 ± 1.52 (4–10)

6.05 ± 1.60 (4–10)

6.54 ± 1.39 (4–9)

0.310

Functional score (Merle d’Aubigne–Postel score)

14.44 ± 1.63 (8–17)

15.19 ± 1.25 (13–17)

13.23 ± 2.24 (8–15)

0.003