Table 3.

Multivariate models demonstrating associations with re-operation following a subtrochanteric fracture

	Adjusted OR (95% CI)	p-value
Age < 75 years old	3.00 (1.42–6.33)	0.004
Type of nail (long Gamma nail)	2.44 (1.18–5.03)	0.016
Coxa-vara femoral neck shaft anglea	4.77 (1.31– 17.4)	0.018
Reduction angleb of > 10° varus	4.62 (1.30–16.45)	0.018
Fracture-related infection	10.65 (1.76–64.41)	0.010
Non-union	17.36 (8.19–36.81)	< 0.001

^aFemoral neck shaft angle: pre-injury angles, assumed to be the same and measured from the opposite uninjured hip. In cases of bilateral fractures, measurements were taken from the radiographs closest to the date of injury

^bReduction angle: measured in the immediate post-operative period