Imaging Evaluation of Insertion Point Accuracy in Retrograde Intramedullary Femoral Nailing

Table 3

Univariate and linear regression analyses of all factors on the sagittal plane.

	Sagittal plane		Univariate analysis	Linear regression analysis
		Deviation (mm)	value^a	Unstandardized	Unstandardized SE	Standardized	value
Method of needle insertion
Fluoroscopy	48		<0.01	-3.05	0.78	-0.84	<0.01
Direct vision	48
Limited open reduction
Yes	42		0.21
No	54
Side
Left	58		0.14	-1.43	0.80	-0.17	0.08
Right	38
Intramedullary nail diameter
≥11	49		0.46
<11	47
Mechanism of injury
High energy	61		0.13	1.52	0.82	0.18	0.07
Low energy	35
Fracture classification
A33	55		0.89
A32	41

^a values based on the Mann–Whitney test.