Table 3.

Logistic regression analysis

Regression model	Odds ratio	95% Confidence interval	P value
Age	1.01	0.96–1.05	0.811
Gender
Male	0.42	0.15–1.20	0.106
Female	Ref	Ref	Ref
Fracture pattern and reduction grade
Stable, good	0.19	0.02–1.62	0.129
Stable, acceptable	1.14	0.12–11.19	0.909
Unstable, good	0.77	0.22–2.67	0.683
Unstable, acceptable	Ref	Ref	Ref
Unstable, poor	6.61	1.98–22.09	0.002
Nail length
170 mm	Ref	Ref	Ref
200 mm	1.21	0.39–3.77	0.739
240 mm	2.63	0.45–15.41	0.284
Matching degree
High-matching degree	Ref	Ref	Ref
Middle-matching degree	2.43	0.58–10.23	0.225
Low-matching degree	2.22	0.50–9.94	0.295