Predicting the Incidence and Prognosis of Bone Metastatic Breast Cancer: A SEER-Based Observational Study

Table 2

Multivariate logistic regression analysis predicting bone metastasis from breast cancer.

Characteristic	OR	95% CI	value
Age	1.004	1.001-1.008	0.01
Race
White	Reference
Black	1.024	0.902-1.162	0.719
Other	0.785	0.655-0.942	0.009
Unknown	0.237	0.033-1.708	0.153
Grade
1	Reference
2	1.521	1.283-1.803	<0.001
3	1.101	0.921-1.318	0.291
4	1.486	0.856-2.577	0.159
T stage
≤1	Reference
2	3.02	2.62-3.482	<0.001
3	5.576	4.722-6.585	<0.001
4	10.355	8.816-12.163	<0.001
N stage
0	Reference
1	2.157	1.917-2.426	<0.001
2	1.833	1.562-2.150	<0.001
3	2.519	2.151-2.951	<0.001
Subtype
Luminal A	Reference
Luminal B	0.849	0.737-0.979	<0.024
Her2+	0.377	0.304-0.469	<0.001
TNBC	0.431	0.373-0.496	<0.001
Brain metastasis
No	Reference
Yes	6.436	4.987-8.306	<0.001
Liver metastasis
No	Reference
Yes	10.59	9.173-12.226	<0.001
Lung metastasis
No	Reference
Yes	6.31	5.508-7.229	<0.001

OR: odds ratio; CI: confidence interval.