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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