Factors Affecting the Survival of Patients with Oligometastatic Non-Small-Cell Lung Cancer: A Meta-Analysis

Table 1

Characteristics of included studies.

Author	Published year	Study location	Study year	N	Surgical method	Median age, years (range)	Sex (male/female)	Smoking status^†
Bai et al. [22]	2016	China	1995.9–2011.7	76	Brain surgery; SRS	58 (30–82)	52/24	47
Collaud et al. [23]	2012	Switzerland	2002–2008	29	S; WBRT; RT	62 (44–77)	20/9	NA
Fleckenstein et al. [16]	2016	Germany	2000.3–2015.4	75	Surgery; SBRT; SRS; RT	59.1 ± 8.4	43/32	NA
Griffioen et al. [17]	2013	Canada	1999.9–2.12.7	61	Surgery; RT; WBRT; CRT	61.7 ± 9.5	31/30	56
Parikh et al. [15]	2014	USA	2002–2012	186	SBRT; WBRT; SRS	NA	92/94	53
Yano et al. [9]	2010	Japan	2005–2009	138	Surgery; RT	67.8 (38–85)	95/43	NA

WBRT: whole brain radiation therapy; SRS: stereotactic radiosurgery; S: surgical resection; RT: radiotherapy; SBRT: stereotactic body radiotherapy; hSRT: hypofractionated stereotactic radiosurgery; CRT: chemoradiation; SABR: stereotactic ablative radiation therapy; ^†current smoker.