Table 1. Characteristics of 50 Patients with BM.

Characteristic		Total (n=50)	Train-set (n=40)	Test-set (n=10)
Age (median, yr)		62.5 (range 31–81)	64.5 (range 40–81)	60 (range 31–76)
Sex
	Male	25	19	6
	Female	25	21	4
Number of patients per tumor
	1 tumor	7	5	2
	2 tumors	3	2	1
	3 tumors	4	2	2
	≥4 tumors	36	31	5
Tumor volume in cc
	Maximum	101.672	101.672	16.642
	Minimum	0.003	0.003	0.007
	Q1	0.018	0.018	0.024
	Q2 (median)	0.049	0.049	0.069
	Q3	0.203	0.023	0.254

BM, brain metastases.