Table 2. Basic demographic- and disease-related characteristics of the entire population.

Variables	Category	Number ( Total = 140)
Age	Median (IQR)	54 (45.8–60) years
Gender	Male	85 (60.7%)
	Female	55 (39.3%)
KPS	< 70	39 (27.9%)
	70–80	86 (61.4%)
	90	15 (10.7%)
Comorbidities	Yes	28 (20.0%)
	No	112 (80.0%)
Pathology	Adenocarcinoma	135 (96.4%)
	Non-adenocarcinoma	5 (3.6%)
Symptomatic brain metastases	Yes	127 (90.7%)
	No	13 (9.3%)
Motor deficits	Yes	26 (18.6%)
	No	114 (81.4%)
Cranial nerve palsy	Yes	13 (9.3%)
	No	127 (90.7%)
Number of brain metastases	1	6 (4.3%)
	2	25 (17.9%)
	3	12 (8.6%)
	4 or more	97 (69.3%)
RPA class	I	8 (5.7%)
	II	96 (68.6%)
	III	36 (25.7%)
EGFR mutation	Present	40 (28.6%)
	Absent	50 (35.7%)
	Not tested	50 (35.7%)
MMSE score category	No cognitive impairment (24–30)	72 (51.4%)
	Mild impairment (18–23)	41 (29.3%)
	Severe impairment (0–17)	27 (19.3%)