Table 4.

Univariate and multivariate logistic analysis for identifying surgical benefit-related variables in BC patients with BM.

Variables	Univariate analysis			Multivariate analysis
	OR	95%CI	p-value	OR	95%CI	p-value
Age
< 60 years	Reference
≥ 60 years	0.757	0.584-0.981	0.036
Race
African American	Reference			Reference
Other	1.548	0.857-2.796	0.148	1.412	0.765-2.605	0.270
Caucasian populations	2.128	1.482-3.057	<0.001	2.017	1.377-2.954	<0.001
Sex
Female	Reference
Male	3.702	0.743-18.441	0.110
Laterality
Left	Reference
Right	0.857	0.661-1.111	0.245
Grade
I	Reference
II	0.795	0.499-1.268	0.336
III	0.469	0.295-0.748	0.001
IV	0.002	0.001-0.003	1.000
T stage
T1-2	Reference			Reference
T3-4	0.674	0.519-0.875	0.003	0.736	0.559-0.970	0.029
N stage
N0	Reference
N1-3	0.778	0.564-1.074	0.127
Primary site
Central portion of breast	Reference
Lower-inner	1.053	0.453-2.444	0.905
Lower-outer	1.228	0.568-2.653	0.601
Upper-inner	0.992	0.518-1.902	0.982
Upper-outer	0.847	0.510-1.406	0.520
Other	0.795	0.491-1.286	0.349
Histology
Ductal	Reference
Lobular	0.995	0.661-1.497	0.980
Other	0.752	0.505-1.121	0.162
Breast subtype
HR+/HER2-	Reference			Reference
HR+/HER2+	1.301	0.898-1.885	0.164	1.571	1.065-2.318	0.023
HR-/HER2+	0.657	0.378-1.142	0.137	0.948	0.531-1.694	0.858
HR-/HER2-	0.184	0.102-0.331	<0.001	0.234	0.128-0.427	<0.001
Tumor size
< 5 cm	Reference
5-10 cm	0.722	0.546-0.955	0.022
> 10 cm	0.437	0.249-0.766	0.004
Lung metastasis
No	Reference
Yes	0.703	0.506-0.978	0.036
Liver metastasis
No	Reference			Reference
Yes	0.483	0.336-0.696	<0.001	0.510	0.346-0.752	0.001
Brain metastasis
No	Reference			Reference
Yes	0.457	0.218-0958	0.038	0.400	0.179-0.894	0.026
Surgery to DM
No	Reference
Yes	1.447	0.761-2.754	0.260
Radiotherapy
No	Reference			Reference
Yes	1.373	1.052-1.792	0.020	1.527	1.147-2.032	0.004
Chemotherapy
No	Reference
Yes	0.994	0.765-1.291	0.961