Table 1. The main features of enrolled studies.

Author	Year	Population	Sample size	Method	Cut-off	miRNA	Survival analysis	Source of HR	Follow-up (month)
Luo	2015	China	88	qRT-PCR	Median	miR-26b	OS, RFS	Reported	mean 74 (5.12-98.5)
Safari	2015	Iran	40	qRT-PCR	Median	miR-20a	OS	DE	100
						miR-10a	OS	DE
Wang C	2015	China	138	qRT-PCR	Median	miR-335	OS, RFS	Reported, DE	Mean 71(23-117)
Wang Q	2015	China	114	qRT-PCR	Median	miR-145	OS	Reported	median 47(11-69)
He	2014	China	73	qRT-PCR	ROC curve	miR-107	OS, DFS	DE	median 68.4
						miR-130a	OS, DFS	DE
Liang	2014	China	335	qRT-PCR	X-tile algorithm	miR-215	DFS	Reported	60
Ma	2014	China	60	qRT-PCR	ROC curve	miR-205	OS	Reported	60
Park	2014	Korea	45	qRT-PCR	2.5-fold	miR-363-3p	OS	Reported	60
Wang	2014	China	54	qRT-PCR	Median	miR-31	OS	Reported	60
Yang	2014	China	133	qRT-PCR	Median	miR-126	OS	Reported	60
Luo	2013	China	60	qRT-PCR	Mean	miR-497	OS, DFS	Reported, DE	60
Shen	2013	China	126	qRT-PCR	Median	miR-224	OS	DE	median 51.9
Huang	2012	China	44	qRT-PCR	Mean	miR-125b	OS	Reported	mean 23.6 (2-70)
						miR-100	OS	Reported
						miR-143	OS	DE
						miR-145	OS	DE
						miR-199a-5p	OS	DE

HR: hazard ratio; qRT-PCR: quantitative real-time polymerase chain reaction; OS: overall survival; RFS: recurrence-free survival; DFS: disease-free survival.