Table 3. Multivariate logistic regression of one site of metastases (bone, lung, liver or brain).

	Bone metastasis				Visceral metastasis
	OR	95% CI	P value		OR	95% CI	P value
Age at diagnosis (vs. ≤40)
≤40 [571]
41–55 [2,013]	0.93	0.83–1.04	0.200		1.01	0.88–1.16	0.930
55–70 [3,103]	1.27	1.14–1.42	<0.001		1.50	1.31–1.71	<0.001
71–85 [1,708]	1.31	1.16–1.48	<0.001		1.59	1.6–2.52	<0.001
>85 [331]	0.66	0.55–0.79	<0.001		1.06	1.62–2.86	0.577
Race recodes (vs. White)
White [5,806]
Black [1,314]	1.14	1.05–1.23	0.002		1.24	1.13–1.35	<0.001
Histology (vs. IDC)
IDC [5,280]
LC [945]	1.07	0.99–1.17	0.10		0.52	0.45–0.60	<0.001
IDC + LC [356]	0.87	0.77–0.99	0.03		0.58	0.48–0.70	<0.001
Grade (vs. I–II)
I–II [3,430]
III–IV [2,857]	1.03	0.96–1.10	0.49		1.19	1.10–1.30	<0.001
AJCC T Stage (vs. ≤ T1)
≤ T1 [889]
T2 [2,277]	3.89	3.55–4.26	<0.001		3.95	3.50–4.47	<0.001
T3 [1,241]	8.44	7.58–9.41	<0.001		11.21	9.78–12.86	<0.001
T4 [2,385]	35.47	32.00–39.32	<0.001		44.91	39.49–51.07	<0.001
AJCC N Stage (vs. N0)
N0 [1,798]
N1 [3,418]	3.07	2.86–3.31	<0.001		3.06	2.80–3.35	<0.001
N2 [864]	2.44	2.19–2.71	<0.001		2.13	1.88–2.43	<0.001
N3 [1,035]	4.40	3.96–4.89	<0.001		3.89	3.43–4.01	<0.001
HR status (vs. TNBC)
TNBC [1,449]
ER+/PR− [1,118]	2.03	1.82–2.27	<0.001		1.01	0.90–1.13	0.901
ER−/PR+ [93]	1.05	0.76–1.45	0.756		1.25	0.96–1.61	0.097
ER+/PR+ [5,066]	1.97	1.80–2.17	<0.001		0.84	0.77–0.92	<0.001

ER, estrogen receptor; PR, progesterone receptor; IDC, intraductal carcinoma; TNBC, triple-negative breast cancer.