Table 3. Binary logistic regression analysis of prognostic factors for lymph node metastasis of breast cancer.

	β	S.E.	Wald	Sig.	OR	95.0% C.I.for EXP (β)
						Lower	Upper
Age	−0.028	0.01	7.62	0.006	0.973	0.954	0.992
Tumor size	0.514	0.107	23.068	0.000	1.671	1.355	2.061
Feature E	0.529	0.231	5.264	0.022	1.698	1.080	2.668
Constant	0.017	0.550	0.001	0.975	1.017