Table 2. Meta-analysis: HR values of OS and DFS in NSCLC subgroups according to patient source.

Factors	No. of studies	No. of patients	Effects model	HR (95%CI)	p	Heterogeneity
						I2(%)	Ph
Overall for OS	8	1246	REM	2.21(1.42-3.42)	<0.001	66.6	0.004
Ethnicity
Asian	7	1131	REM	2.48(1.54-3.99)	<0.001	63.3	0.012
Caucasian	1	115	-	1.2(0.72-2)	0.485	-	-
Overall for DFS	6	1060	FEM	1.73(1.35-2.23)	<0.001	0	0.58
Ethnicity
Asian	4	641	FEM	1.61(1.2-2.16)	0.001	0	0.479
Caucasian	2	419	FEM	2.16(1.3-3.57)	0.003	0	0.558