Table 2.

The basic characteristics of each group.

		Surgery group	SRS group
Total number		550	163
Average ages		55.5 y	59.7 y
Male: female		331: 103	96: 49
S: M*		101: 76	81: 33
Pathological	ADC*	196	–
	SCC*	103	–
	LC*	17	–
T stage	T1–2	201	–
	T3	55	–
	T4	2	–
N stage	N0	151	20
	N1	35	6
	N2	60	–
	N3	1	–
WBRT		218	78
Thoracic surgery		394	17
Thoracic radiotherapy		113	14

S: M – synchronous versus metachronous brain metastasis; ADC – adenocarcinoma; SCC – squamous cell carcinoma; LC – large cell carcinoma.