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

Table 5 Multivariate regression analyses of functional score (Merle d’Aubigne–Postel score)

	Beta	Standard Error	p-Value	VIF
Age (years)	0.039	0.016	0.026	2.211
Sex (male)	− 0.574	0.667	0.399	2.155
Injury mechanism (fall)	− 0.341	0.921	0.714	1.564
Combined injury (yes)	− 0.185	0.526	0.729	2.299
With neck fracture	0.293	1.172	0.805	3.686
With acetabular fracture	1.146	0.526	0.040	1.797
Complication (AVN)	− 3.817	1.485	0.017	4.067
Complication (HO)	− 0.413	0.489	0.407	1.742
Complication (others)	− 0.960	0.648	0.152	1.453
Time to bone union	− 0.331	0.184	0.086	2.534
Radiologic outcome	0.818	0.317	0.017	2.267

R square: 0.817, Durbin–Watson: 2.045, analysis of variance F-value 8.907 (p = 0.000).
VIF, variance inflation factor; AVN, avascular necrosis; HO, heterotopic ossification

ISSN: 1749-799X