Table 6.

Multi-factor logistic analysis.

Factor	β	S.E.	Wals	Sig.	Exp (β)	EXP(β) 95% CI
						Lower limit	Superior limit
Age	2.629	0.96	7.5	0.006	13.863	2.112	91.000
Classification of fracture	3.421	1.253	7.453	0.006	30.602	2.625	356.784
Fixed type	2.123	0.974	4.751	0.029	8.358	1.239	56.400
Needle loosening	3.754	1.162	10.438	0.001	42.709	4.379	416.574
Retention time	0.066	0.025	6.944	0.008	1.068	1.017	1.122