Table 1.

Demographic and clinical characteristics of the included metastases samples. The table shows number of included metastases, number of respective patients, age at the time of brain metastases diagnosis by receptor status, and number of metastases of the sample patient by receptor status. ER, estrogen receptor; PR, progesterone receptor; HER2, human epidermal growth factor receptor 2. * Number of patients included with single brain metastasis; ** number of patients included with multiple brain metastases.

	Number of		Age of Sample Patient			Number of Metastases of Sample Patient
	Metastases	Patients	Mean	Min	Max	Mean	Min	Max
All patients	412	106 30 * 76 **	55.9	33	84	5.4	1	66
Classifier 1 (ER)	Total samples
ER+	190	53	58.3	33	76	4	1	63
ER−	222	53	53.9	36	79	5.9	1	66
Classifier 2 (PR)	Total samples
PR+	147	37	59.5	39	76	4.5	1	63
PR−	265	69	53.9	33	84	5.7	1	66
Classifier 3 (HER)	Total samples
HER+	169	45	54.5	36	81	4.1	1	63
HER−	243	61	56.9	33	84	6.1	1	66